21491807040

Names of 21491807040

• Cardinal: 21491807040 can be written as Twenty-one billion, four hundred ninety-one million, eight hundred seven thousand and forty.

Scientific notation

• Scientific notation: 2.149180704 × 10¹⁰

Factors of 21491807040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 61694

Divisors of 21491807040

• Number of divisors d(n): 252
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 32 33 36 40 44 45 48 55 60 64 66 72 80 88 90 96 99 110 120 121 132 144 160 165 176 180 192 198 220 240 242 264 288 320 330 352 360 363 396 440 480 484 495 528 576 605 660 704 720 726 792 880 960 968 990 1056 1089 1210 1320 1440 1452 1584 1760 1815 1936 1980 2112 2178 2420 2640 2880 2904 3168 3520 3630 3872 3960 4356 4840 5280 5445 5808 6336 7260 7744 7920 8712 9680 10560 10890 11616 14520 15840 17424 19360 21780 23232 29040 31680 34848 38720 43560 58080 61673 69696 87120 116160 123346 174240 185019 246692 308365 348480 370038 493384 555057 616730 678403 740076 925095 986768 1110114 1233460 1356806 1480152 1850190 1973536 2035209 2220228 2466920 2713612 2775285 2960304 3392015 3700380 3947072 4070418 4440456 4933840 5427224 5550570 5920608 6105627 6784030 7400760 7462433 8140836 8880912 9867680 10176045 10854448 11101140 11841216 12211254 13568060 14801520 14924866 16281672 17761824 19735360 20352090 21708896 22202280 22387299 24422508 27136120 29603040 29849732 30528135 32563344 35523648 37312165 40704180 43417792 44404560 44774598 48845016 54272240 59206080 59699464 61056270 65126688 67161897 74624330 81408360 88809120 89549196 97690032 108544480 111936495 119398928 122112540 130253376 134323794 149248660 162816720 177618240 179098392 195380064 217088960 223872990 238797856 244225080 268647588 298497320 325633440 335809485 358196784 390760128 447745980 477595712 488450160 537295176 596994640 651266880 671618970 716393568 895491960 976900320 1074590352 1193989280 1343237940 1432787136 1790983920 1953800640 2149180704 2387978560 2686475880 3581967840 4298361408 5372951760 7163935680 10745903520 21491807040
• Sum of all divisors σ(n): 81255371652
• Sum of proper divisors (its aliquot sum) s(n): 59763564612
• 21491807040 is an abundant number, because the sum of its proper divisors (59763564612) is greater than itself. Its abundance is 38271757572

Bases of 21491807040

• Binary: 10100000001000000101111001101000000₂
• Hexadecimal: 0x50102F340
• Base-36: 9VFO0G0

Squares and roots of 21491807040

• 21491807040 squared (21491807040²) is 461897769844593561600
• 21491807040 cubed (21491807040³) is 9927017741706335613133553664000
• The square root of 21491807040 is 146600.8425623809
• The cube root of 21491807040 is 2780.2956330361

Scales and comparisons

• 21,491,807,040 seconds is equal to 683 years, 19 weeks, 2 days, 18 hours, 24 minutes.
• To count from 1 to 21,491,807,040 would take you about one thousand, three hundred sixty-six 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 21491807040 cubic inches would be around 231.7 feet tall.

Recreational maths with 21491807040

• 21491807040 backwards is 04070819412
• 21491807040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21491807040's digits is 36
• More coming soon!