Q: Is 21,104 a Prime Number?
A: No, 21,104 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 21104 can be evenly divided by 1 2 4 8 16 1,319 2,638 5,276 10,552 and 21,104, with no remainder.
Since 21,104 cannot be divided by just 1 and 21,104, it is not a prime number.