Q: Is 21,432,400 a Composite Number?

Why is 21,432,400 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 21,432,400 can be evenly divided by 1 2 4 5 8 10 11 16 20 22 25 40 44 50 55 80 88 100 110 176 200 220 275 400 440 550 880 1,100 2,200 4,400 4,871 9,742 19,484 24,355 38,968 48,710 53,581 77,936 97,420 107,162 121,775 194,840 214,324 243,550 267,905 389,680 428,648 487,100 535,810 857,296 974,200 1,071,620 1,339,525 1,948,400 2,143,240 2,679,050 4,286,480 5,358,100 10,716,200 and 21,432,400, with no remainder.

Since 21,432,400 cannot be divided by just 1 and 21,432,400, 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).