21105187840

Names of 21105187840

• Cardinal: 21105187840 can be written as Twenty-one billion, one hundred five million, one hundred eighty-seven thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.110518784 × 10¹⁰

Factors of 21105187840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 200

Divisors of 21105187840

• Number of divisors d(n): 352
• Complete list of divisors:
  1 2 4 5 8 10 11 16 19 20 22 32 38 40 44 55 64 76 80 88 95 110 121 128 152 160 163 176 190 209 220 242 256 304 320 326 352 380 418 440 484 512 605 608 640 652 704 760 815 836 880 968 1024 1045 1210 1216 1280 1304 1331 1408 1520 1630 1672 1760 1793 1936 2090 2299 2420 2432 2560 2608 2662 2816 3040 3097 3260 3344 3520 3586 3872 4180 4598 4840 4864 5120 5216 5324 5632 6080 6194 6520 6655 6688 7040 7172 7744 8360 8965 9196 9680 9728 10432 10648 11264 11495 12160 12388 13040 13310 13376 14080 14344 15485 15488 16720 17930 18392 19360 19456 19723 20864 21296 22990 24320 24776 25289 26080 26620 26752 28160 28688 30970 30976 33440 34067 35860 36784 38720 39446 41728 42592 45980 48640 49552 50578 52160 53240 53504 56320 57376 61940 61952 66880 68134 71720 73568 77440 78892 83456 85184 91960 97280 98615 99104 101156 104320 106480 107008 114752 123880 123904 126445 133760 136268 143440 147136 154880 157784 166912 170335 170368 183920 197230 198208 202312 208640 212960 214016 216953 229504 247760 252890 267520 272536 286880 294272 309760 315568 340670 340736 367840 374737 394460 396416 404624 417280 425920 433906 459008 495520 505780 535040 545072 573760 588544 619520 631136 681340 681472 735680 749474 788920 792832 809248 834560 851840 867812 918016 991040 1011560 1070080 1084765 1090144 1147520 1177088 1262272 1362680 1362944 1471360 1498948 1577840 1585664 1618496 1703680 1735624 1836032 1873685 1982080 2023120 2169530 2180288 2295040 2354176 2524544 2725360 2942720 2997896 3155680 3171328 3236992 3407360 3471248 3747370 3964160 4046240 4122107 4339060 4360576 4590080 5049088 5450720 5885440 5995792 6311360 6473984 6814720 6942496 7494740 7928320 8092480 8244214 8678120 8721152 9180160 10098176 10901440 11770880 11991584 12622720 12947968 13884992 14989480 15856640 16184960 16488428 17356240 17442304 20196352 20610535 21802880 23983168 25245440 25895936 27769984 29978960 32369920 32976856 34712480 34884608 41221070 43605760 47966336 50490880 55539968 59957920 64739840 65953712 69424960 82442140 87211520 95932672 100981760 111079936 119915840 129479680 131907424 138849920 164884280 174423040 191865344 222159872 239831680 263814848 277699840 329768560 383730688 479663360 527629696 555399680 659537120 959326720 1055259392 1110799360 1319074240 1918653440 2110518784 2638148480 4221037568 5276296960 10552593920 21105187840
• Sum of all divisors σ(n): 58977181440
• Sum of proper divisors (its aliquot sum) s(n): 37871993600
• 21105187840 is an abundant number, because the sum of its proper divisors (37871993600) is greater than itself. Its abundance is 16766805760

Bases of 21105187840

• Binary: 10011101001111101111001110000000000₂
• Hexadecimal: 0x4E9F79C00
• Base-36: 9P1HF5S

Squares and roots of 21105187840

• 21105187840 squared (21105187840²) is 445428953761683865600
• 21105187840 cubed (21105187840³) is 9400861738515012578185314304000
• The square root of 21105187840 is 145276.2466475507
• The cube root of 21105187840 is 2763.5229395235

Scales and comparisons

• 21,105,187,840 seconds is equal to 671 years, 4 weeks, 1 day, 10 minutes, 40 seconds.
• To count from 1 to 21,105,187,840 would take you about one thousand, three hundred forty-two years!

  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 21105187840 cubic inches would be around 230.3 feet tall.

Recreational maths with 21105187840

• 21105187840 backwards is 04878150112
• The number of decimal digits it has is: 11
• The sum of 21105187840's digits is 37
• More coming soon!