Q: Is 21,964 a Prime Number?
A: No, 21,964 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 21964 can be evenly divided by 1 2 4 17 19 34 38 68 76 289 323 578 646 1,156 1,292 5,491 10,982 and 21,964, with no remainder.
Since 21,964 cannot be divided by just 1 and 21,964, it is not a prime number.