Q: Is 21,736 a Prime Number?
A: No, 21,736 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 21736 can be evenly divided by 1 2 4 8 11 13 19 22 26 38 44 52 76 88 104 143 152 209 247 286 418 494 572 836 988 1,144 1,672 1,976 2,717 5,434 10,868 and 21,736, with no remainder.
Since 21,736 cannot be divided by just 1 and 21,736, it is not a prime number.