21408540912

Names of 21408540912

• Cardinal: 21408540912 can be written as Twenty-one billion, four hundred eight million, five hundred forty thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 2.1408540912 × 10¹⁰

Factors of 21408540912

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2283

Divisors of 21408540912

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 17 18 22 24 33 34 36 44 48 51 66 68 72 88 99 102 132 136 144 153 176 187 198 204 264 272 306 374 396 408 439 528 561 612 748 792 816 878 1122 1224 1317 1496 1584 1683 1756 1811 2244 2448 2634 2992 3366 3512 3622 3951 4488 4829 5268 5433 6732 7024 7244 7463 7902 8976 9658 10536 10866 13464 14487 14488 14926 15804 16299 19316 19921 21072 21732 22389 26928 28974 28976 29852 30787 31608 32598 38632 39842 43461 43464 44778 57948 59704 59763 61574 63216 65196 67167 77264 79684 82093 86922 86928 89556 92361 115896 119408 119526 123148 130392 134334 159368 164186 173844 179112 179289 184722 231792 239052 246279 246296 260784 268668 277083 318736 328372 338657 347688 358224 358578 369444 478104 492558 492592 537336 554166 656744 677314 695376 717156 738837 738888 795029 956208 985116 1015971 1074672 1108332 1313488 1354628 1434312 1477674 1477776 1590058 1970232 2031942 2216664 2385087 2709256 2868624 2955348 3047913 3180116 3940464 4063884 4433328 4770174 5418512 5910696 6095826 6360232 7155261 8127768 8745319 9540348 11821392 12191652 12720464 13515493 14310522 16255536 17490638 19080696 24383304 26235957 27030986 28621044 34981276 38161392 40546479 48766608 52471914 54061972 57242088 69962552 78707871 81092958 104943828 108123944 114484176 121639437 139925104 148670423 157415742 162185916 209887656 216247888 243278874 297340846 314831484 324371832 419775312 446011269 486557748 594681692 629662968 648743664 892022538 973115496 1189363384 1259325936 1338033807 1784045076 1946230992 2378726768 2676067614 3568090152 5352135228 7136180304 10704270456 21408540912
• Sum of all divisors σ(n): 69401629440
• Sum of proper divisors (its aliquot sum) s(n): 47993088528
• 21408540912 is an abundant number, because the sum of its proper divisors (47993088528) is greater than itself. Its abundance is 26584547616

Bases of 21408540912

• Binary: 10011111100000011000110100011110000₂
• Hexadecimal: 0x4FC0C68F0
• Base-36: 9U23BW0

Squares and roots of 21408540912

• 21408540912 squared (21408540912²) is 458325623980777791744
• 21408540912 cubed (21408540912³) is 9812082872010409656132439830528
• The square root of 21408540912 is 146316.5777073807
• The cube root of 21408540912 is 2776.7004014379

Scales and comparisons

• 21,408,540,912 seconds is equal to 680 years, 37 weeks, 5 days, 55 minutes, 12 seconds.
• To count from 1 to 21,408,540,912 would take you about one thousand, three hundred sixty-one 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 21408540912 cubic inches would be around 231.4 feet tall.

Recreational maths with 21408540912

• 21408540912 backwards is 21904580412
• 21408540912 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21408540912's digits is 36
• More coming soon!