Q: Is 21,432 a Prime Number?
A: No, 21,432 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 21432 can be evenly divided by 1 2 3 4 6 8 12 19 24 38 47 57 76 94 114 141 152 188 228 282 376 456 564 893 1,128 1,786 2,679 3,572 5,358 7,144 10,716 and 21,432, with no remainder.
Since 21,432 cannot be divided by just 1 and 21,432, it is not a prime number.