Q: Is 21,968 a Prime Number?
A: No, 21,968 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 21968 can be evenly divided by 1 2 4 8 16 1,373 2,746 5,492 10,984 and 21,968, with no remainder.
Since 21,968 cannot be divided by just 1 and 21,968, it is not a prime number.