21456870720128928

Names of 21456870720128928

• Cardinal: 21456870720128928 can be written as Twenty-one quadrillion, four hundred fifty-six trillion, eight hundred seventy billion, seven hundred twenty million, one hundred twenty-eight thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1456870720128928 × 10¹⁶

Factors of 21456870720128928

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 2459742968

Divisors of 21456870720128928

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 28 32 36 42 48 56 63 72 84 96 112 126 144 168 224 252 288 336 504 672 1008 2016 4327 8654 12981 17308 25962 30289 34616 38943 51924 60578 69232 77886 90867 103848 121156 138464 155772 181734 207696 242312 272601 311544 363468 415392 484624 545202 623088 726936 969248 1090404 1246176 1453872 2180808 2907744 4361616 8723232 2459738629 4919477258 7379215887 9838954516 14758431774 17218170403 19677909032 22137647661 29516863548 34436340806 39355818064 44275295322 51654511209 59033727096 68872681612 78711636128 88550590644 103309022418 118067454192 137745363224 154963533627 177101181288 206618044836 236134908384 275490726448 309927067254 354202362576 413236089672 550981452896 619854134508 708404725152 826472179344 1239708269016 1652944358688 2479416538032 4958833076064 10643289047683 21286578095366 31929867143049 42573156190732 63859734286098 74503023333781 85146312381464 95789601429147 127719468572196 149006046667562 170292624762928 191579202858294 223509070001343 255438937144392 298012093335124 340585249525856 383158405716588 447018140002686 510877874288784 596024186670248 670527210004029 766316811433176 894036280005372 1021755748577568 1192048373340496 1341054420008058 1532633622866352 1788072560010744 2384096746680992 2682108840016116 3065267245732704 3576145120021488 5364217680032232 7152290240042976 10728435360064464 21456870720128928
• Sum of all divisors σ(n): 69750946076273280
• Sum of proper divisors (its aliquot sum) s(n): 48294075356144352
• 21456870720128928 is an abundant number, because the sum of its proper divisors (48294075356144352) is greater than itself. Its abundance is 26837204636015424

Bases of 21456870720128928

• Binary: 1001100001110101110100100000101010000111100011110100000₂
• Hexadecimal: 0x4C3AE90543C7A0
• Base-36: 5V9TQBUS2W0

Squares and roots of 21456870720128928

• 21456870720128928 squared (21456870720128928²) is 460397301100326101256392942429184
• 21456870720128928 cubed (21456870720128928³) is 9878685369605969007736315782806188072373989834752
• The square root of 21456870720128928 is 146481639.5324988435
• The cube root of 21456870720128928 is 277878.8299301493

Scales and comparisons

• 21,456,870,720,128,928 seconds is equal to 682,262,118 years, 22 weeks, 6 days, 14 hours, 28 minutes, 48 seconds.
• To count from 1 to 21,456,870,720,128,928 would take you about two billion, forty-six million, seven hundred eighty-six thousand, three hundred fifty-five 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 21456870720128928 cubic inches would be around 23156.6 feet tall.

Recreational maths with 21456870720128928

• 21456870720128928 backwards is 82982102707865412
• 21456870720128928 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 21456870720128928's digits is 72
• More coming soon!