When you dream a number and remember it afterward, it has a meaning that could be important to you. Numbers in dreams may sometimes not appear directly. Sometimes, numbers can be presented in the number of characters, number of objects, or an action that is repeated a certain number of times. Usually, you want to stick with the basic numbers (1 through 9) when trying to decipher the meaning to multiple digit numbers. For example, the number "1965" could mean the year 1965. But you can also add up the digits until you get one number. Thus 1965 --> 1+9+6+5 = 21 --> 2+1 = 3.

Also worth noting is that odd numbers are considered more aggressive then even numbers, while even numbers are considered to be more tranquil.

Zero - Zero denotes timelessness, super-conscious, eternity, and absolute freedom. It also symbolizes God.
One - One stands for individuality, individuality solitude, the ego, leadership, originality, beginnings, and a winner. It also stands for a higher spiritual force. Two - Two stands for balance, diversity, partnership, soul, or receptivity. It can also symbolize double weakness or double strength. There is a duality as in male and female, mother and father, yin and yang, etc. In the dreams, the 2 is about balancing the male/female energies, needing people, relationship to something, putting others before yourself, balance needed somewhere in your life.
Three - Three signifies life, vitality, inner strength, completion, imagination, creativity, energy, and self-exploration. Three stands for trilogy as in the past, present, and future or father, mother, and child, etc. The three appears in a dream it represents creativity, happiness, joy, the need for saying what’s true in your heart, may be a spiritual message in the dream.
Four - Four denotes stability, physical limitations, hard labor and earthly things, as in the four corners of the earth. It also stands for materialistic matters. You get things done. Hard work, foundation of something, the root of a family issue, need for order and self-discipline; can mean it’s time to put things into form or to look to health care.
Five - Five represents your persuasiveness, spontaneity, daring/bold nature, action or the five human senses. This number may reflect a change in course. It is also the link between heaven and earth. Change is taking place now or very soon; feeling of liberation, freedom, wanting to explore and take a risk.
Six - Six is indicative of cooperation, balance, tranquility, perfection, warmth, union, marriage, family, and love. Your mental, emotional, and spiritual states are in harmony. It is also indicative of domestic bliss. Looking for self-harmony or needing balance, the number of guidance, the White Brotherhood (teachers of truth), indicates love is present and self-care is needed.
Seven - Seven signifies mental perfection, healing, completion, music and attainment of high spirituality. Additionally, you are unique and eccentric. A mystical number, means wisdom of a spiritual, mystical nature; stands for the 7 chakras, the path of solitude, the cycle of death and rebirth.
Eight - Eight stands for power of authority, success, karma, material gains, regeneration, and wealth. When the number eight appears in your dream, trust your instincts and intuition. Material wealth, self-power and empowerment, abundance, authenticity, achievement, self-mastery.
Nine - Nine denotes completion and that you are on a productive path. Rebirth, inspiration and reformation. You are seeking to improve the world. Selflessness, signifies completion and endings, releasing the old.
Ten - Ten corresponds to closure, great strength, and gains. It also symbolizes the law and can refer to the ten commandments.
Eleven - Eleven stands for intuition, mastery in a particular domain, spirituality, enlightenment, and capacity to achieve. It is symbolic of your creativity and visions. The number 11 is represented by two parallel lines and thus could represent two individuals or some partnership. Master number, means self-illumination, intuition, inspiration.
Twelve - Twelve denotes spiritual strength and divine perfection.
Thirteen - Thirteen is a paradoxical number which means death and birth, end and beginning, and change and transition. It is symbolic of obstacles that are standing on your way and must overcome. You must work hard and persevere in order to succeed and reach your goals.
Fourteen - The number fourteen signifies the unexpected and your need to adapt to ever-changing circumstances. It is also symbolic of overindulgence and giving into your desires. You need to be more committed and maintain focus on your goals.
Fifteen - Fifteen represents a dissolution of difficult conditions.
Sixteen - Sixteen, typically, symbolizes innocence, naive, vulnerability, and tenderness. It also indicates some spiritual cleansing and destruction of the old and birth of the new.
Seventeen - Seventeen symbolizes soul.
Eighteen - Eighteen symbolizes the conflict between materialism and spirituality. It also warns of treachery, deception, lies, and selfishness.
Nineteen - Nineteen indicates independence and the overcoming of personal struggles. You will find that you often have to stand up for yourself. This number also suggests your stubbornness and you hesitance in accepting help from others.
Twenty-One - The number twenty-one represents a turning point in your life and your transitional into adulthood. It is also associated with the responsibilities that you need to own up to.
Twenty-Two - Twenty-Two denotes mental powers and knowledge. It also indicates that you are goal-oriented and practical. Master number, spiritual expression of balance and integration of self and others, self-mastery on both the material and spiritual planes.
Twenty-Four - The number twenty-four symbolizes rewards, happiness, love, money, success and creativity. It also indicates your associations with people of high position and power. You may also exhibit a certain arrogance in love and in your success.
Twenty-Six - Twenty-Six symbolizes the earth and karma.
Thirty-Three - Thirty-Three represents high potential and mastery in your own spiritual consciousness. An open channel to the Divine, unformed energy.
Thirty-Nine - The number thirty-nine, symbolizes understanding, thoughtfulness, meditation, and mental superiority.
Forty - Forty denotes that time is on your side. It is a period of cleansing, preparation and growth.
Forty-Four - Forty-four refers to a sacred union or divine marriage.
Fifty - Fifty stands for all that is holy.
Sixty - This number is associated with time. It may refer to time running out or longevity.
911 - The appearance of this number in your dream suggests that you need not be afraid to ask for help. There is an important lesson to be learned from in your dream.