21408513840

Names of 21408513840

• Cardinal: 21408513840 can be written as Twenty-one billion, four hundred eight million, five hundred thirteen thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.140851384 × 10¹⁰

Factors of 21408513840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 246

Divisors of 21408513840

• Number of divisors d(n): 420
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 35 36 40 42 45 48 54 56 60 63 70 72 80 81 84 90 105 108 112 120 126 135 140 144 162 168 180 189 210 216 229 240 243 252 270 280 315 324 336 360 378 405 420 432 458 486 504 540 560 567 630 648 687 720 729 756 810 840 916 945 972 1008 1080 1134 1145 1215 1260 1296 1374 1458 1512 1603 1620 1680 1701 1832 1890 1944 2061 2160 2268 2290 2430 2520 2748 2835 2916 3024 3206 3240 3402 3435 3645 3664 3780 3888 4122 4536 4580 4809 4860 5040 5103 5496 5670 5832 6183 6412 6480 6804 6870 7290 7560 8015 8244 8505 9072 9160 9618 9720 10206 10305 10992 11340 11664 12366 12824 13608 13740 14427 14580 15120 16030 16488 17010 18320 18549 19236 19440 20412 20610 22680 24045 24732 25515 25648 27216 27480 28854 29160 30915 32060 32976 34020 37098 38472 40824 41220 43281 45360 48090 49464 51030 52441 54960 55647 57708 58320 61830 64120 68040 72135 74196 76944 81648 82440 86562 92745 96180 98928 102060 104882 111294 115416 123660 128240 129843 136080 144270 148392 157323 164880 166941 173124 185490 192360 204120 209764 216405 222588 230832 247320 259686 262205 278235 288540 296784 314646 333882 346248 367087 370980 384720 389529 408240 419528 432810 445176 471969 494640 519372 524410 556470 577080 629292 649215 667764 692496 734174 741960 779058 786615 834705 839056 865620 890352 943938 1038744 1048820 1101261 1112940 1154160 1168587 1258584 1298430 1335528 1415907 1468348 1483920 1558116 1573230 1669410 1731240 1835435 1887876 1947645 2077488 2097640 2202522 2225880 2337174 2359845 2517168 2596860 2671056 2831814 2936696 3116232 3146460 3303783 3338820 3462480 3670870 3775752 3895290 4195280 4247721 4405044 4451760 4674348 4719690 5193720 5506305 5663628 5842935 5873392 6232464 6292920 6607566 6677640 7079535 7341740 7551504 7790580 8495442 8810088 9348696 9439380 9911349 10387440 11012610 11327256 11685870 12585840 12743163 13215132 13355280 14159070 14683480 15581160 16518915 16990884 17620176 18697392 18878760 19822698 21238605 22025220 22654512 23371740 25486326 26430264 28318140 29366960 29734047 31162320 33037830 33981768 37757520 38229489 39645396 42477210 44050440 46743480 49556745 50972652 52860528 56636280 59468094 63715815 66075660 67963536 76458978 79290792 84954420 88100880 89202141 93486960 99113490 101945304 113272560 118936188 127431630 132151320 148670235 152917956 158581584 169908840 178404282 191147445 198226980 203890608 237872376 254863260 264302640 267606423 297340470 305835912 339817680 356808564 382294890 396453960 446010705 475744752 509726520 535212846 594680940 611671824 713617128 764589780 792907920 892021410 1019453040 1070425692 1189361880 1338032115 1427234256 1529179560 1784042820 2140851384 2378723760 2676064230 3058359120 3568085640 4281702768 5352128460 7136171280 10704256920 21408513840
• Sum of all divisors σ(n): 85663271664
• Sum of proper divisors (its aliquot sum) s(n): 64254757824
• 21408513840 is an abundant number, because the sum of its proper divisors (64254757824) is greater than itself. Its abundance is 42846243984

Bases of 21408513840

• Binary: 10011111100000010111111111100110000₂
• Hexadecimal: 0x4FC0BFF30
• Base-36: 9U22R00

Squares and roots of 21408513840

• 21408513840 squared (21408513840²) is 458324464837471545600
• 21408513840 cubed (21408513840³) is 9812045648683602934583791104000
• The square root of 21408513840 is 146316.4851956197
• The cube root of 21408513840 is 2776.6992310193

Scales and comparisons

• 21,408,513,840 seconds is equal to 680 years, 37 weeks, 4 days, 17 hours, 24 minutes.
• To count from 1 to 21,408,513,840 would take you about one thousand, three hundred sixty-one 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 21408513840 cubic inches would be around 231.4 feet tall.

Recreational maths with 21408513840

• 21408513840 backwards is 04831580412
• 21408513840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21408513840's digits is 36
• More coming soon!