Q: Is 21,681,800 a Composite Number?

Why is 21,681,800 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 21,681,800 can be evenly divided by 1 2 4 5 7 8 10 14 17 20 25 28 34 35 40 50 56 68 70 85 100 119 136 140 170 175 200 238 280 340 350 425 476 595 680 700 850 911 952 1,190 1,400 1,700 1,822 2,380 2,975 3,400 3,644 4,555 4,760 5,950 6,377 7,288 9,110 11,900 12,754 15,487 18,220 22,775 23,800 25,508 30,974 31,885 36,440 45,550 51,016 61,948 63,770 77,435 91,100 108,409 123,896 127,540 154,870 159,425 182,200 216,818 255,080 309,740 318,850 387,175 433,636 542,045 619,480 637,700 774,350 867,272 1,084,090 1,275,400 1,548,700 2,168,180 2,710,225 3,097,400 4,336,360 5,420,450 10,840,900 and 21,681,800, with no remainder.

Since 21,681,800 cannot be divided by just 1 and 21,681,800, 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).