Q: Is 21,646 a Prime Number?
A: No, 21,646 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 21646 can be evenly divided by 1 2 79 137 158 274 10,823 and 21,646, with no remainder.
Since 21,646 cannot be divided by just 1 and 21,646, it is not a prime number.