Are 0 and 1 a prime number?
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It is even, as it is a multiple of 2 (as it is a multiple of every number). Zero is not prime, since it has more than 2 divisors. Zero is even, since 0=2⋅0, and 0 is an integer. If we use "number" in essentially any of the usual senses (integer, real number, complex number), yes, zero is a number.