a word or sign that represents an amount or a quantity: Pick a number between one and ten. The game works best with an even number of players (=2, 4, 6, 8, 10, etc. players).
►digit
any of the numbers between 0 and 9, for example 1, 5, or 8. Used especially in formal or technical language: The number 5,987 has four digits.
►numeral
a written sign that represents a number in a particular number system: The clock has Roman numerals; XII means 12.
►integer
a whole number, not a fraction or a decimal. Used when talking about math: 6 is an integer, but 6.4 is not.
math a whole number, for example 6 is an integer, but 6.4 is not ► see thesaurus at number1