21001451520

Names of 21001451520

• Cardinal: 21001451520 can be written as Twenty-one billion, one million, four hundred fifty-one thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.100145152 × 10¹⁰

Factors of 21001451520

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 913

Divisors of 21001451520

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 64 70 80 84 96 105 112 120 127 128 140 160 168 192 210 224 240 254 256 280 320 336 381 384 420 448 480 508 512 560 635 640 672 762 768 769 840 889 896 960 1016 1024 1120 1270 1280 1344 1524 1536 1538 1680 1778 1792 1905 1920 2032 2048 2240 2307 2540 2560 2667 2688 3048 3072 3076 3360 3556 3584 3810 3840 3845 4064 4445 4480 4614 5080 5120 5334 5376 5383 6096 6144 6152 6720 7112 7168 7620 7680 7690 8128 8890 8960 9228 10160 10240 10668 10752 10766 11535 12192 12304 13335 13440 14224 14336 15240 15360 15380 16149 16256 17780 17920 18456 20320 21336 21504 21532 23070 24384 24608 26670 26880 26915 28448 30480 30720 30760 32298 32512 35560 35840 36912 40640 42672 43008 43064 46140 48768 49216 53340 53760 53830 56896 60960 61520 64596 65024 71120 71680 73824 80745 81280 85344 86128 92280 97536 97663 98432 106680 107520 107660 113792 121920 123040 129192 130048 142240 147648 161490 162560 170688 172256 184560 195072 195326 196864 213360 215040 215320 227584 243840 246080 258384 260096 284480 292989 295296 322980 325120 341376 344512 369120 390144 390652 393728 426720 430640 455168 487680 488315 492160 516768 568960 585978 590592 645960 650240 682752 683641 689024 738240 780288 781304 787456 853440 861280 910336 975360 976630 984320 1033536 1137920 1171956 1181184 1291920 1300480 1365504 1367282 1378048 1464945 1476480 1562608 1574912 1706880 1722560 1820672 1950720 1953260 1968640 2050923 2067072 2275840 2343912 2362368 2583840 2731008 2734564 2756096 2929890 2952960 3125216 3413760 3418205 3445120 3901440 3906520 3937280 4101846 4134144 4551680 4687824 4724736 5167680 5462016 5469128 5512192 5859780 5905920 6250432 6827520 6836410 6890240 7813040 7874560 8203692 8268288 9103360 9375648 10254615 10335360 10938256 11024384 11719560 11811840 12500864 13655040 13672820 13780480 15626080 16407384 16536576 18751296 20509230 20670720 21876512 23439120 23623680 25001728 27310080 27345640 27560960 31252160 32814768 33073152 37502592 41018460 41341440 43753024 46878240 50003456 54691280 55121920 62504320 65629536 75005184 82036920 82682880 87506048 93756480 100006912 109382560 125008640 131259072 150010368 164073840 165365760 175012096 187512960 200013824 218765120 250017280 262518144 300020736 328147680 350024192 375025920 437530240 500034560 525036288 600041472 656295360 700048384 750051840 875060480 1000069120 1050072576 1312590720 1400096768 1500103680 1750120960 2100145152 2625181440 3000207360 3500241920 4200290304 5250362880 7000483840 10500725760 21001451520
• Sum of all divisors σ(n): 77491814400
• Sum of proper divisors (its aliquot sum) s(n): 56490362880
• 21001451520 is an abundant number, because the sum of its proper divisors (56490362880) is greater than itself. Its abundance is 35488911360

Bases of 21001451520

• Binary: 10011100011110010001011100000000000₂
• Hexadecimal: 0x4E3C8B800
• Base-36: 9NBPZPC

Squares and roots of 21001451520

• 21001451520 squared (21001451520²) is 441060965946910310400
• 21001451520 cubed (21001451520³) is 9262920493698407777653751808000
• The square root of 21001451520 is 144918.7755951589
• The cube root of 21001451520 is 2758.9877405295

Scales and comparisons

• 21,001,451,520 seconds is equal to 667 years, 40 weeks, 4 days, 8 hours, 32 minutes.
• To count from 1 to 21,001,451,520 would take you about one thousand, three hundred thirty-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 21001451520 cubic inches would be around 229.9 feet tall.

Recreational maths with 21001451520

• 21001451520 backwards is 02515410012
• 21001451520 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21001451520's digits is 21
• More coming soon!