Q: Is 21,440,128 a Composite Number?

Why is 21,440,128 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 21,440,128 can be evenly divided by 1 2 4 8 16 17 32 34 59 64 68 118 128 136 167 236 272 334 472 544 668 944 1,003 1,088 1,336 1,888 2,006 2,176 2,672 2,839 3,776 4,012 5,344 5,678 7,552 8,024 9,853 10,688 11,356 16,048 19,706 21,376 22,712 32,096 39,412 45,424 64,192 78,824 90,848 128,384 157,648 167,501 181,696 315,296 335,002 363,392 630,592 670,004 1,261,184 1,340,008 2,680,016 5,360,032 10,720,064 and 21,440,128, with no remainder.

Since 21,440,128 cannot be divided by just 1 and 21,440,128, 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).