Q: Is 21,312,680 a Composite Number?

Why is 21,312,680 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 21,312,680 can be evenly divided by 1 2 4 5 8 10 19 20 29 38 40 58 76 95 116 145 152 190 232 290 380 551 580 760 967 1,102 1,160 1,934 2,204 2,755 3,868 4,408 4,835 5,510 7,736 9,670 11,020 18,373 19,340 22,040 28,043 36,746 38,680 56,086 73,492 91,865 112,172 140,215 146,984 183,730 224,344 280,430 367,460 532,817 560,860 734,920 1,065,634 1,121,720 2,131,268 2,664,085 4,262,536 5,328,170 10,656,340 and 21,312,680, with no remainder.

Since 21,312,680 cannot be divided by just 1 and 21,312,680, 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).