20821755864

Names of 20821755864

• Cardinal: 20821755864 can be written as Twenty billion, eight hundred twenty-one million, seven hundred fifty-five thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 2.0821755864 × 10¹⁰

Factors of 20821755864

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 674

Divisors of 20821755864

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 21 24 26 28 31 39 41 42 52 56 62 78 82 84 91 93 104 123 124 156 164 168 169 182 186 217 246 248 273 287 312 328 338 364 372 403 434 492 507 533 546 574 577 651 676 728 744 806 861 868 984 1014 1066 1092 1148 1154 1183 1209 1271 1302 1352 1599 1612 1722 1731 1736 2028 2132 2184 2296 2308 2366 2418 2542 2604 2821 3198 3224 3444 3462 3549 3731 3813 4039 4056 4264 4616 4732 4836 5084 5208 5239 5642 6396 6888 6924 6929 7098 7462 7501 7626 8078 8463 8897 9464 9672 10168 10478 11193 11284 12117 12792 13848 13858 14196 14924 15002 15252 15717 16156 16523 16926 17794 17887 20787 20956 22386 22503 22568 23657 24234 26691 27716 28392 29848 30004 30504 31434 32312 33046 33852 35588 35774 36673 41574 41912 44772 45006 47314 48468 48503 49569 52507 53382 53661 55432 60008 62868 66092 67704 70971 71176 71548 73346 83148 89544 90012 94628 96936 97006 97513 99138 105014 106764 107322 110019 115661 125209 125736 132184 141942 143096 145509 146692 157521 165599 166296 180024 189256 194012 195026 198276 210028 213528 214644 214799 220038 231322 232531 250418 283884 291018 292539 293384 307541 315042 331198 346983 375627 388024 390052 396552 420056 429288 429598 440076 462644 465062 496797 500836 567768 582036 585078 615082 630084 644397 662396 682591 693966 697593 733367 751254 780104 859196 880152 922623 925288 930124 993594 1001672 1164072 1170156 1230164 1260168 1288794 1324792 1365182 1387932 1395186 1466734 1502508 1503593 1627717 1718392 1845246 1860248 1987188 2047773 2152787 2200101 2340312 2460328 2577588 2730364 2775864 2790372 2933468 3005016 3007186 3022903 3255434 3690492 3974376 3998033 4095546 4305574 4400202 4510779 4883151 5133569 5155176 5460728 5580744 5866936 6014372 6045806 6458361 6510868 7380984 7996066 8191092 8611148 8800404 9021558 9068709 9533771 9766302 10267138 11994099 12028744 12091612 12916722 13021736 15400707 15992132 16382184 17222296 17600808 18043116 18137418 19067542 19532604 20534276 21160321 23988198 24183224 25833444 27986231 28601313 30801414 31984264 36086232 36274836 38135084 39065208 41068552 42320642 47976396 51666888 55972462 57202626 61602828 63480963 66736397 72549672 76270168 83958693 84641284 95952792 111944924 114405252 123205656 123939023 126961926 133472794 167917386 169282568 200209191 223889848 228810504 247878046 253923852 266945588 335834772 371817069 400418382 495756092 507847704 533891176 671669544 743634138 800836764 867573161 991512184 1487268276 1601673528 1735146322 2602719483 2974536552 3470292644 5205438966 6940585288 10410877932 20821755864
• Sum of all divisors σ(n): 68236922880
• Sum of proper divisors (its aliquot sum) s(n): 47415167016
• 20821755864 is an abundant number, because the sum of its proper divisors (47415167016) is greater than itself. Its abundance is 26593411152

Bases of 20821755864

• Binary: 10011011001000100101100011111011000₂
• Hexadecimal: 0x4D912C7D8
• Base-36: 9KCQHNC

Squares and roots of 20821755864

• 20821755864 squared (20821755864²) is 433545517260018386496
• 20821755864 cubed (20821755864³) is 9027178916319701051770906412544
• The square root of 20821755864 is 144297.4561937943
• The cube root of 20821755864 is 2751.0962401457

Scales and comparisons

• 20,821,755,864 seconds is equal to 662 years, 3 weeks, 3 days, 13 hours, 4 minutes, 24 seconds.
• To count from 1 to 20,821,755,864 would take you about one thousand, three hundred twenty-four 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 20821755864 cubic inches would be around 229.3 feet tall.

Recreational maths with 20821755864

• 20821755864 backwards is 46855712802
• The number of decimal digits it has is: 11
• The sum of 20821755864's digits is 48
• More coming soon!