21012992

Names of 21012992

• Cardinal: 21012992 can be written as Twenty-one million, twelve thousand, nine hundred ninety-two.

Scientific notation

• Scientific notation: 2.1012992 × 10⁷

Factors of 21012992

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 74

Divisors of 21012992

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 4 7 8 11 13 14 16 22 26 28 32 41 44 52 56 64 77 82 88 91 104 112 128 143 154 164 176 182 208 224 256 286 287 308 328 352 364 416 448 451 512 533 572 574 616 656 704 728 832 896 902 1001 1066 1144 1148 1232 1312 1408 1456 1664 1792 1804 2002 2132 2288 2296 2464 2624 2816 2912 3157 3328 3584 3608 3731 4004 4264 4576 4592 4928 5248 5632 5824 5863 6314 6656 7216 7462 8008 8528 9152 9184 9856 10496 11648 11726 12628 14432 14924 16016 17056 18304 18368 19712 20992 23296 23452 25256 28864 29848 32032 34112 36608 36736 39424 41041 46592 46904 50512 57728 59696 64064 68224 73216 73472 82082 93808 101024 115456 119392 128128 136448 146944 164164 187616 202048 230912 238784 256256 272896 328328 375232 404096 477568 512512 656656 750464 808192 955136 1313312 1500928 1616384 1910272 2626624 3001856 5253248 10506496 21012992
• Sum of all divisors σ(n): 57746304
• Sum of proper divisors (its aliquot sum) s(n): 36733312
• 21012992 is an abundant number, because the sum of its proper divisors (36733312) is greater than itself. Its abundance is 15720320

Bases of 21012992

• Binary: 1010000001010001000000000₂
• Hexadecimal: 0x140A200
• Base-36: CIDQ8

Squares and roots of 21012992

• 21012992 squared (21012992²) is 441545832792064
• 21012992 cubed (21012992³) is 9278199052092978495488
• The square root of 21012992 is 4583.9930191919
• The cube root of 21012992 is 275.9493010563

Scales and comparisons

• 21,012,992 seconds is equal to 34 weeks, 5 days, 4 hours, 56 minutes, 32 seconds.
• To count from 1 to 21,012,992 would take you about nineteen hours!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21012992 cubic inches would be around 23 feet tall.

Recreational maths with 21012992

• 21012992 backwards is 29921012
• 21012992 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21012992's digits is 26
• More coming soon!