numeral
This is a symbol used to represent a number.
There are two types of numeral.
(1) Roman numerals:
I = 1
V = 5
X = 10
L = 50
C = 100
D = 500
M = 1000
(2) Hindu-Arabic numerals, namely the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9. This is the type used most commonly today.