21681512680320

Names of 21681512680320

• Cardinal: 21681512680320 can be written as Twenty-one trillion, six hundred eighty-one billion, five hundred twelve million, six hundred eighty thousand, three hundred twenty.

Scientific notation

• Scientific notation: 2.168151268032 × 10¹³

Factors of 21681512680320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 3364236

Divisors of 21681512680320

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 64 72 80 90 96 108 120 128 135 144 160 180 192 216 240 270 288 320 360 373 384 432 480 540 576 640 720 746 864 960 1080 1119 1152 1440 1492 1728 1865 1920 2160 2238 2880 2984 3357 3456 3730 4320 4476 5595 5760 5968 6714 7460 8640 8952 10071 11190 11936 13428 14920 16785 17280 17904 20142 22380 23872 26856 29840 33570 35808 40284 44760 47744 50355 53712 59680 67140 71616 80568 89520 100710 107424 119360 134280 143232 161136 179040 201420 214848 238720 268560 322272 358080 402840 429696 537120 644544 716160 805680 1074240 1289088 1611360 2148480 3222720 3363853 6445440 6727706 10091559 13455412 16819265 20183118 26910824 30274677 33638530 40366236 50457795 53821648 60549354 67277060 80732472 90824031 100915590 107643296 121098708 134554120 151373385 161464944 181648062 201831180 215286592 242197416 269108240 302746770 322929888 363296124 403662360 430573184 454120155 484394832 538216480 605493540 645859776 726592248 807324720 908240310 968789664 1076432960 1210987080 1254717169 1291719552 1453184496 1614649440 1816480620 1937579328 2152865920 2421974160 2509434338 2906368992 3229298880 3632961240 3764151507 3875158656 4843948320 5018868676 5812737984 6273585845 6458597760 7265922480 7528303014 9687896640 10037737352 11292454521 11625475968 12547171690 14531844960 15056606028 18820757535 19375793280 20075474704 22584909042 25094343380 29063689920 30113212056 33877363563 37641515070 40150949408 45169818084 50188686760 56462272605 58127379840 60226424112 67754727126 75283030140 80301898816 90339636168 100377373520 112924545210 120452848224 135509454252 150566060280 160603797632 169386817815 180679272336 200754747040 225849090420 240905696448 271018908504 301132120560 338773635630 361358544672 401509494080 451698180840 481811392896 542037817008 602264241120 677547271260 722717089344 803018988160 903396361680 1084075634016 1204528482240 1355094542520 1445434178688 1806792723360 2168151268032 2409056964480 2710189085040 3613585446720 4336302536064 5420378170080 7227170893440 10840756340160 21681512680320
• Sum of all divisors σ(n): 76994581435200
• Sum of proper divisors (its aliquot sum) s(n): 55313068754880
• 21681512680320 is an abundant number, because the sum of its proper divisors (55313068754880) is greater than itself. Its abundance is 33631556074560

Bases of 21681512680320

• Binary: 100111011100000011110110111001000101110000000₂
• Hexadecimal: 0x13B81EDC8B80
• Base-36: 7OOCKULC0

Squares and roots of 21681512680320

• 21681512680320 squared (21681512680320²) is 470087992106876950515302400
• 21681512680320 cubed (21681512680320³) is 10192218761731420675271462143799328768000
• The square root of 21681512680320 is 4656341.1258540755
• The cube root of 21681512680320 is 27884.5212806801

Scales and comparisons

• 21,681,512,680,320 seconds is equal to 689,405 years, 1 week, 6 days, 19 hours, 12 minutes.
• To count from 1 to 21,681,512,680,320 would take you about one million, seven hundred twenty-three thousand, five hundred twelve 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 21681512680320 cubic inches would be around 2323.7 feet tall.

Recreational maths with 21681512680320

• 21681512680320 backwards is 02308621518612
• 21681512680320 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 21681512680320's digits is 45
• More coming soon!