Q: Is 21,240,340 a Composite Number?

Why is 21,240,340 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 21,240,340 can be evenly divided by 1 2 4 5 10 11 20 22 44 55 67 110 121 131 134 220 242 262 268 335 484 524 605 655 670 737 1,210 1,310 1,340 1,441 1,474 2,420 2,620 2,882 2,948 3,685 5,764 7,205 7,370 8,107 8,777 14,410 14,740 15,851 16,214 17,554 28,820 31,702 32,428 35,108 40,535 43,885 63,404 79,255 81,070 87,770 96,547 158,510 162,140 175,540 193,094 317,020 386,188 482,735 965,470 1,062,017 1,930,940 2,124,034 4,248,068 5,310,085 10,620,170 and 21,240,340, with no remainder.

Since 21,240,340 cannot be divided by just 1 and 21,240,340, 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).