Q: Is 21,721,004 a Prime Number?
A: No, 21,721,004 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 21721004 can be evenly divided by 1 2 4 73 146 292 1,019 2,038 4,076 5,329 10,658 21,316 74,387 148,774 297,548 5,430,251 10,860,502 and 21,721,004, with no remainder.
Since 21,721,004 cannot be divided by just 1 and 21,721,004, it is not a prime number.
| Number | 21,721,002 | 21,721,003 | 21,721,005 | 21,721,006 |
| Prime? | no | no | no | no |