Q: Is 21,000,100 a Composite Number?

Why is 21,000,100 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 21,000,100 can be evenly divided by 1 2 4 5 10 11 17 20 22 25 34 44 50 55 68 85 100 110 170 187 220 275 340 374 425 550 748 850 935 1,100 1,123 1,700 1,870 2,246 3,740 4,492 4,675 5,615 9,350 11,230 12,353 18,700 19,091 22,460 24,706 28,075 38,182 49,412 56,150 61,765 76,364 95,455 112,300 123,530 190,910 210,001 247,060 308,825 381,820 420,002 477,275 617,650 840,004 954,550 1,050,005 1,235,300 1,909,100 2,100,010 4,200,020 5,250,025 10,500,050 and 21,000,100, with no remainder.

Since 21,000,100 cannot be divided by just 1 and 21,000,100, 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).