21395387832

Names of 21395387832

• Cardinal: 21395387832 can be written as Twenty-one billion, three hundred ninety-five million, three hundred eighty-seven thousand, eight hundred thirty-two.

Scientific notation

• Scientific notation: 2.1395387832 × 10¹⁰

Factors of 21395387832

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 25

Divisors of 21395387832

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 21 24 26 28 39 42 49 52 56 78 84 91 98 104 147 156 168 169 182 196 273 294 312 338 343 364 392 507 546 588 637 676 686 728 1014 1029 1092 1176 1183 1274 1352 1372 1911 2028 2058 2184 2197 2366 2401 2548 2744 3549 3822 4056 4116 4394 4459 4732 4802 5096 6591 7098 7203 7644 8232 8281 8788 8918 9464 9604 13182 13377 14196 14406 15288 15379 16562 17576 17836 19208 24843 26364 26754 28392 28561 28812 30758 31213 33124 35672 46137 49686 52728 53508 57122 57624 57967 61516 62426 66248 85683 92274 93639 99372 107016 107653 114244 115934 123032 124852 171366 173901 184548 187278 198744 199927 215306 228488 231868 249704 322959 342732 347802 369096 371293 374556 399854 405769 430612 463736 599781 645918 685464 695604 742586 749112 753571 799708 811538 861224 1113879 1199562 1217307 1291836 1391208 1399489 1485172 1507142 1599416 1623076 2227758 2260713 2399124 2434614 2583672 2599051 2798978 2970344 3014284 3246152 4198467 4455516 4521426 4798248 4869228 5198102 5274997 5597956 6028568 7797153 8396934 8911032 9042852 9738456 9796423 10396204 10549994 11195912 15594306 15824991 16793868 18085704 18193357 19592846 20792408 21099988 29389269 31188612 31649982 33587736 36386714 39185692 42199976 54580071 58778538 62377224 63299964 68574961 72773428 78371384 109160142 117557076 126599928 127353499 137149922 145546856 205724883 218320284 235114152 254706998 274299844 382060497 411449766 436640568 509413996 548599688 764120994 822899532 891474493 1018827992 1528241988 1645799064 1782948986 2674423479 3056483976 3565897972 5348846958 7131795944 10697693916 21395387832
• Sum of all divisors σ(n): 67599446040
• Sum of proper divisors (its aliquot sum) s(n): 46204058208
• 21395387832 is an abundant number, because the sum of its proper divisors (46204058208) is greater than itself. Its abundance is 24808670376

Bases of 21395387832

• Binary: 10011111011010000111011010110111000₂
• Hexadecimal: 0x4FB43B5B8
• Base-36: 9TU9EWO

Squares and roots of 21395387832

• 21395387832 squared (21395387832²) is 457762620481693660224
• 21395387832 cubed (21395387832³) is 9794008800198462516708111994368
• The square root of 21395387832 is 146271.6234681217
• The cube root of 21395387832 is 2776.1316308591

Scales and comparisons

• 21,395,387,832 seconds is equal to 680 years, 15 weeks, 6 days, 19 hours, 17 minutes, 12 seconds.
• To count from 1 to 21,395,387,832 would take you about one thousand, three hundred sixty 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 21395387832 cubic inches would be around 231.3 feet tall.

Recreational maths with 21395387832

• 21395387832 backwards is 23878359312
• The number of decimal digits it has is: 11
• The sum of 21395387832's digits is 51
• More coming soon!