Q: Is 21,454,420 a Composite Number?

Why is 21,454,420 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,454,420 can be evenly divided by 1 2 4 5 10 13 19 20 26 38 43 52 65 76 86 95 101 130 172 190 202 215 247 260 380 404 430 494 505 559 817 860 988 1,010 1,118 1,235 1,313 1,634 1,919 2,020 2,236 2,470 2,626 2,795 3,268 3,838 4,085 4,343 4,940 5,252 5,590 6,565 7,676 8,170 8,686 9,595 10,621 11,180 13,130 16,340 17,372 19,190 21,242 21,715 24,947 26,260 38,380 42,484 43,430 49,894 53,105 56,459 82,517 86,860 99,788 106,210 112,918 124,735 165,034 212,420 225,836 249,470 282,295 330,068 412,585 498,940 564,590 825,170 1,072,721 1,129,180 1,650,340 2,145,442 4,290,884 5,363,605 10,727,210 and 21,454,420, with no remainder.

Since 21,454,420 cannot be divided by just 1 and 21,454,420, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).