21505704990

Names of 21505704990

• Cardinal: 21505704990 can be written as Twenty-one billion, five hundred five million, seven hundred four thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 2.150570499 × 10¹⁰

Factors of 21505704990

• Number of distinct prime factors ω(n): 9
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 142

Divisors of 21505704990

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 5 6 7 10 11 14 15 17 19 21 22 30 33 34 35 37 38 41 42 51 55 57 66 70 74 77 82 85 95 102 105 110 111 114 119 123 133 154 165 170 185 187 190 205 209 210 222 231 238 246 255 259 266 285 287 323 330 357 361 370 374 385 399 407 410 418 451 462 510 518 555 561 570 574 595 615 627 629 646 665 697 703 714 722 770 777 779 798 814 861 902 935 969 1045 1083 1110 1122 1155 1190 1221 1230 1254 1258 1295 1309 1330 1353 1394 1406 1435 1463 1517 1554 1558 1615 1722 1785 1805 1870 1887 1938 1995 2035 2090 2091 2109 2166 2255 2261 2310 2337 2442 2527 2590 2618 2706 2805 2849 2870 2926 3034 3135 3145 3157 3230 3485 3515 3553 3570 3610 3774 3885 3895 3927 3971 3990 4070 4182 4218 4305 4389 4403 4510 4522 4551 4674 4845 4879 4921 5054 5415 5453 5610 5698 6105 6137 6270 6290 6314 6545 6765 6783 6919 6970 7030 7106 7315 7581 7585 7667 7733 7770 7790 7854 7942 8547 8569 8610 8778 8806 9102 9435 9471 9690 9758 9842 10455 10545 10619 10659 10830 10906 11305 11685 11913 11951 12210 12274 12635 13090 13209 13243 13357 13530 13566 13838 14245 14630 14637 14763 14801 15162 15170 15334 15466 15785 16359 16687 17094 17138 17765 18411 18870 18942 19635 19855 20757 20910 21090 21238 21318 21945 22015 22610 22755 23001 23199 23370 23826 23902 24395 24605 24871 25270 25707 25789 26418 26486 26714 27265 27797 28490 28823 29274 29526 29602 30685 31570 31857 32718 33374 33915 34595 35530 35853 36822 37905 38335 38665 39270 39710 39729 40071 41514 42735 42845 42959 43890 44030 44403 45510 46002 46398 47355 48433 48790 49210 49742 50061 51414 51578 53095 53295 53669 54131 54530 55594 57646 59565 59755 59983 61370 63714 66045 66215 66785 67507 67830 69190 71706 73185 73815 74005 74613 75810 76670 77330 77367 79458 80142 81795 83391 83435 83657 85470 85690 85918 86469 88806 92055 92701 93499 94710 96866 100122 103607 103785 106190 106590 107338 108262 115005 115995 116809 119130 119510 119966 124355 128535 128877 128945 131461 132090 132430 133570 135014 138985 144115 145299 145673 146370 146927 147630 148010 149226 154734 159285 161007 162393 162811 163590 166782 166870 167314 172938 179265 179949 180523 184110 185402 186998 198645 200355 201761 202521 207214 207570 214795 222015 227069 230010 231990 233618 242165 248710 250305 250971 251617 257070 257754 257890 262922 268345 270655 277970 278103 280497 283679 288230 290598 291346 293854 299915 310821 317053 318570 322014 324786 325622 337535 350427 358530 359898 361046 373065 386835 394383 397290 400710 403522 405042 416955 418285 429590 432345 437019 440781 444030 454138 463505 467495 472549 484330 488433 489991 500610 501942 503234 518035 536690 541310 541569 547637 556206 560994 567358 584045 599830 605283 621642 634106 644385 657305 675070 681207 700854 726495 728365 734635 746130 754851 773670 788766 805035 811965 814055 833910 836570 851037 864690 874038 881562 899745 902615 920227 927010 934990 945098 951159 976866 979982 1008805 1012605 1019711 1028489 1036070 1083138 1095274 1135345 1139677 1168090 1210566 1254855 1258085 1288770 1314610 1362414 1390515 1402485 1417647 1418395 1452990 1456730 1469270 1469973 1509702 1554105 1585265 1589483 1610070 1623930 1628110 1642911 1702074 1752135 1761319 1799490 1805230 1840454 1902318 1971915 1985753 2017610 2025210 2039422 2056978 2185095 2203905 2219371 2270690 2279354 2362745 2442165 2449955 2497759 2509710 2516170 2707845 2738185 2760681 2767787 2781030 2804970 2835294 2836790 2939946 3026415 3059133 3085467 3108210 3170530 3178966 3285822 3406035 3419031 3429937 3504270 3522638 3774255 3833459 3943830 3971506 4255185 4370190 4407810 4438742 4601135 4725490 4755795 4768449 4884330 4899910 4995518 5098555 5142445 5283957 5389901 5415690 5476370 5521362 5535574 5698385 5957259 6024007 6052830 6118266 6170934 6658113 6812070 6838062 6859874 7088235 7349865 7493277 7548510 7666918 7947415 8214555 8303361 8510370 8806595 9202270 9309829 9511590 9536898 9928765 10197110 10284890 10289811 10567914 10779802 11096855 11396770 11500377 11914518 12048014 12488795 13316226 13803405 13838935 14176470 14699730 14986554 15295665 15427335 15894830 16169703 16429110 16606722 17095155 17149685 17484313 17613190 18072021 18619658 19167295 19374509 19857530 20579622 22193710 23000754 23842245 24977590 26419785 26949505 27606810 27677870 27929487 29786295 30120035 30591330 30854670 32339406 33290565 34190310 34299370 34968626 36144042 37466385 37729307 38334590 38749018 41516805 42168049 46549145 47684490 51449055 52452939 52839570 53899010 55858974 57501885 58123527 59572590 60240070 65168803 66581130 74932770 75458614 80848515 83033610 84336098 87421565 90360105 93098290 96872545 102408119 102898110 104905878 113187921 115003770 116247054 126504147 130337606 139647435 161697030 174843130 180720210 188646535 193745090 195506409 204816238 210840245 226375842 253008294 262264695 279294870 290617635 307224357 325844015 377293070 391012818 421680490 512040595 524529390 565939605 581235270 614448714 632520735 651688030 716856833 977532045 1024081190 1131879210 1265041470 1433713666 1536121785 1955064090 2150570499 3072243570 3584284165 4301140998 7168568330 10752852495 21505704990
• Sum of all divisors σ(n): 75654383616
• Sum of proper divisors (its aliquot sum) s(n): 54148678626
• 21505704990 is an abundant number, because the sum of its proper divisors (54148678626) is greater than itself. Its abundance is 32642973636

Bases of 21505704990

• Binary: 10100000001110101110000010000011110₂
• Hexadecimal: 0x501D7041E
• Base-36: 9VNXW66

Squares and roots of 21505704990

• 21505704990 squared (21505704990²) is 462495347116910900100
• 21505704990 cubed (21505704990³) is 9946288494343932857665961499000
• The square root of 21505704990 is 146648.2355502445
• The cube root of 21505704990 is 2780.8948083949

Scales and comparisons

• 21,505,704,990 seconds is equal to 683 years, 42 weeks, 2 days, 14 hours, 56 minutes, 30 seconds.
• To count from 1 to 21,505,704,990 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 21505704990 cubic inches would be around 231.7 feet tall.

Recreational maths with 21505704990

• 21505704990 backwards is 09940750512
• 21505704990 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21505704990's digits is 42
• More coming soon!