Is zero an odd number?
No. Zero is not an odd number. Zero is an even number.
A number a is even if there exists an integer b that makes the following equation true:
a = 2 x b
0 is an integer, so let b = 0 and you get
0 = 2 x 0
So 0 is even.
Please see the article "Parity of Zero" in the Related Links sections for more information.