21509431840

Names of 21509431840

• Cardinal: 21509431840 can be written as Twenty-one billion, five hundred nine million, four hundred thirty-one thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.150943184 × 10¹⁰

Factors of 21509431840

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 348

Divisors of 21509431840

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 5 8 10 13 16 19 20 26 31 32 38 40 52 62 65 76 80 95 97 104 124 130 152 155 160 181 190 194 208 247 248 260 304 310 362 380 388 403 416 485 494 496 520 589 608 620 724 760 776 806 905 970 988 992 1040 1178 1235 1240 1261 1448 1520 1552 1612 1810 1843 1940 1976 2015 2080 2353 2356 2470 2480 2522 2896 2945 3007 3040 3104 3224 3439 3620 3686 3880 3952 4030 4706 4712 4940 4960 5044 5611 5792 5890 6014 6305 6448 6878 7240 7372 7657 7760 7904 8060 9215 9412 9424 9880 10088 11222 11765 11780 12028 12610 12896 13756 14480 14744 15035 15314 15520 16120 17195 17557 18430 18824 18848 19760 20176 22444 23530 23560 23959 24056 25220 27512 28055 28960 29488 30070 30628 32240 34390 35114 36860 37648 38285 39091 39520 40352 44707 44888 47060 47120 47918 48112 50440 55024 56110 57133 58976 60140 61256 64480 68780 70228 72943 73720 75296 76570 78182 87785 89414 89776 94120 94240 95836 96224 100880 106609 110048 112220 114266 119795 120280 122512 137560 140456 145886 147440 153140 156364 175570 178828 179552 188240 191672 195455 201760 213218 223535 224440 228241 228532 239590 240560 245024 275120 280912 285665 291772 294880 306280 312728 333583 351140 357656 364715 376480 383344 390910 426436 447070 448880 456482 457064 479180 481120 533045 544267 550240 561824 571330 583544 612560 625456 667166 702280 715312 729430 742729 766688 781820 852872 894140 897760 912964 914128 958360 1066090 1088534 1141205 1142660 1167088 1225120 1250912 1334332 1385917 1404560 1430624 1458860 1485458 1563640 1667915 1705744 1788280 1825928 1828256 1916720 2132180 2177068 2282410 2285320 2334176 2668664 2721335 2771834 2809120 2917720 2970916 3127280 3335830 3411488 3576560 3651856 3713645 3833440 4264360 4336579 4354136 4564820 4570640 5337328 5442670 5543668 5835440 5941832 6254560 6671660 6929585 7075471 7153120 7303712 7427290 8528720 8673158 8708272 9129640 9141280 10341073 10674656 10885340 11087336 11670880 11883664 13343320 13859170 14150942 14854580 17057440 17346316 17416544 18259280 20682146 21682895 21770680 22174672 23767328 26686640 27718340 28301884 29709160 34692632 35377355 36518560 41364292 43365790 43541360 44349344 51705365 53373280 55436680 56603768 59418320 69385264 70754710 82728584 86731580 87082720 103410730 110873360 113207536 118836640 134433949 138770528 141509420 165457168 173463160 206821460 221746720 226415072 268867898 283018840 330914336 346926320 413642920 537735796 566037680 672169745 693852640 827285840 1075471592 1132075360 1344339490 1654571680 2150943184 2688678980 4301886368 5377357960 10754715920 21509431840
• Sum of all divisors σ(n): 60408391680
• Sum of proper divisors (its aliquot sum) s(n): 38898959840
• 21509431840 is an abundant number, because the sum of its proper divisors (38898959840) is greater than itself. Its abundance is 17389528000

Bases of 21509431840

• Binary: 10100000010000011111110001000100000₂
• Hexadecimal: 0x5020FE220
• Base-36: 9VQ5RTS

Squares and roots of 21509431840

• 21509431840 squared (21509431840²) is 462655658079605785600
• 21509431840 cubed (21509431840³) is 9951460342853625939432853504000
• The square root of 21509431840 is 146660.9417670567
• The cube root of 21509431840 is 2781.0554383173

Scales and comparisons

• 21,509,431,840 seconds is equal to 683 years, 48 weeks, 3 days, 18 hours, 10 minutes, 40 seconds.
• To count from 1 to 21,509,431,840 would take you about one thousand, three hundred sixty-seven 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 21509431840 cubic inches would be around 231.8 feet tall.

Recreational maths with 21509431840

• 21509431840 backwards is 04813490512
• The number of decimal digits it has is: 11
• The sum of 21509431840's digits is 37
• More coming soon!