Q: Is 21,916 a Prime Number?
A: No, 21,916 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 21916 can be evenly divided by 1 2 4 5,479 10,958 and 21,916, with no remainder.
Since 21,916 cannot be divided by just 1 and 21,916, it is not a prime number.