Q: Is 21,210,420 a Composite Number?

Why is 21,210,420 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 21,210,420 can be evenly divided by 1 2 3 4 5 6 7 10 11 12 14 15 20 21 22 28 30 33 35 42 44 55 60 66 70 77 84 105 110 132 140 154 165 210 220 231 308 330 385 420 462 660 770 924 1,155 1,540 2,310 4,591 4,620 9,182 13,773 18,364 22,955 27,546 32,137 45,910 50,501 55,092 64,274 68,865 91,820 96,411 101,002 128,548 137,730 151,503 160,685 192,822 202,004 252,505 275,460 303,006 321,370 353,507 385,644 482,055 505,010 606,012 642,740 707,014 757,515 964,110 1,010,020 1,060,521 1,414,028 1,515,030 1,767,535 1,928,220 2,121,042 3,030,060 3,535,070 4,242,084 5,302,605 7,070,140 10,605,210 and 21,210,420, with no remainder.

Since 21,210,420 cannot be divided by just 1 and 21,210,420, 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).