Q: Is 21,016 a Prime Number?
A: No, 21,016 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 21016 can be evenly divided by 1 2 4 8 37 71 74 142 148 284 296 568 2,627 5,254 10,508 and 21,016, with no remainder.
Since 21,016 cannot be divided by just 1 and 21,016, it is not a prime number.