Q: Is 21,660,660 a Composite Number?

Why is 21,660,660 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 21,660,660 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 60 63 70 84 90 105 126 140 180 210 252 315 420 630 1,260 17,191 34,382 51,573 68,764 85,955 103,146 120,337 154,719 171,910 206,292 240,674 257,865 309,438 343,820 361,011 481,348 515,730 601,685 618,876 722,022 773,595 1,031,460 1,083,033 1,203,370 1,444,044 1,547,190 1,805,055 2,166,066 2,406,740 3,094,380 3,610,110 4,332,132 5,415,165 7,220,220 10,830,330 and 21,660,660, with no remainder.

Since 21,660,660 cannot be divided by just 1 and 21,660,660, 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).