21031820784

Names of 21031820784

• Cardinal: 21031820784 can be written as Twenty-one billion, thirty-one million, eight hundred twenty thousand, seven hundred eighty-four.

Scientific notation

• Scientific notation: 2.1031820784 × 10¹⁰

Factors of 21031820784

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1671

Divisors of 21031820784

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 19 24 26 36 38 39 48 52 57 72 76 78 104 114 117 144 152 156 171 208 228 234 247 304 312 342 456 468 494 541 624 684 741 912 936 988 1082 1093 1368 1482 1623 1872 1976 2164 2186 2223 2736 2964 3246 3279 3952 4328 4372 4446 4869 5928 6492 6558 7033 8656 8744 8892 9738 9837 10279 11856 12984 13116 14066 14209 17488 17784 19476 19674 20558 20767 21099 25968 26232 28132 28418 30837 35568 38952 39348 41116 41534 42198 42627 52464 56264 56836 61674 62301 63297 77904 78696 82232 83068 84396 85254 92511 112528 113672 123348 124602 126594 127881 133627 157392 164464 166136 168792 170508 185022 186903 227344 246696 249204 253188 255762 267254 269971 332272 337584 341016 370044 373806 400881 493392 498408 506376 511524 534508 539942 591313 682032 740088 747612 801762 809913 996816 1012752 1023048 1069016 1079884 1182626 1202643 1480176 1495224 1603524 1619826 1773939 2046096 2138032 2159768 2365252 2405286 2429739 2990448 3207048 3239652 3547878 4319536 4730504 4810572 4859478 5321817 6414096 6479304 7095756 7687069 9461008 9621144 9718956 10643634 11234947 12958608 14191512 15374138 19242288 19437912 21287268 22469894 23061207 28383024 30748276 33704841 38875824 42574536 44939788 46122414 61496552 67409682 69183621 85149072 89879576 92244828 101114523 122993104 134819364 138367242 146054311 179759152 184489656 202229046 269638728 276734484 292108622 368979312 404458092 438162933 539277456 553468968 584217244 808916184 876325866 1106937936 1168434488 1314488799 1617832368 1752651732 2336868976 2628977598 3505303464 5257955196 7010606928 10515910392 21031820784
• Sum of all divisors σ(n): 66908252320
• Sum of proper divisors (its aliquot sum) s(n): 45876431536
• 21031820784 is an abundant number, because the sum of its proper divisors (45876431536) is greater than itself. Its abundance is 24844610752

Bases of 21031820784

• Binary: 10011100101100110000001110111110000₂
• Hexadecimal: 0x4E5981DF0
• Base-36: 9NTSWS0

Squares and roots of 21031820784

• 21031820784 squared (21031820784²) is 442337485490294374656
• 21031820784 cubed (21031820784³) is 9303162720877071659168343650304
• The square root of 21031820784 is 145023.5180375927
• The cube root of 21031820784 is 2760.3169831271

Scales and comparisons

• 21,031,820,784 seconds is equal to 668 years, 38 weeks, 5 days, 20 hours, 26 minutes, 24 seconds.
• To count from 1 to 21,031,820,784 would take you about one thousand, three hundred thirty-seven 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 21031820784 cubic inches would be around 230 feet tall.

Recreational maths with 21031820784

• 21031820784 backwards is 48702813012
• 21031820784 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21031820784's digits is 36
• More coming soon!