21505213440

Names of 21505213440

• Cardinal: 21505213440 can be written as Twenty-one billion, five hundred five million, two hundred thirteen thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.150521344 × 10¹⁰

Factors of 21505213440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 333

Divisors of 21505213440

• Number of divisors d(n): 528
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 23 24 30 32 36 40 45 46 48 60 64 69 72 80 90 92 96 103 115 120 128 138 144 160 180 184 192 197 206 207 230 240 256 276 288 309 320 345 360 368 384 394 412 414 460 480 512 515 552 576 591 618 640 690 720 736 768 788 824 828 920 927 960 985 1024 1030 1035 1104 1152 1182 1236 1280 1380 1440 1472 1536 1545 1576 1648 1656 1773 1840 1854 1920 1970 2060 2070 2208 2304 2364 2369 2472 2560 2760 2880 2944 2955 3072 3090 3152 3296 3312 3546 3680 3708 3840 3940 4120 4140 4416 4531 4608 4635 4728 4738 4944 5120 5520 5760 5888 5910 6180 6304 6592 6624 7092 7107 7360 7416 7680 7880 8240 8280 8832 8865 9062 9216 9270 9456 9476 9888 11040 11520 11776 11820 11845 12360 12608 13184 13248 13593 14184 14214 14720 14832 15360 15760 16480 16560 17664 17730 18124 18540 18912 18952 19776 20291 21321 22080 22655 23040 23552 23640 23690 24720 25216 26368 26496 27186 28368 28428 29440 29664 31520 32960 33120 35328 35460 35535 36248 37080 37824 37904 39552 40582 40779 42642 44160 45310 46080 47280 47380 49440 50432 52736 52992 54372 56736 56856 58880 59328 60873 63040 65920 66240 67965 70656 70920 71070 72496 74160 75648 75808 79104 81164 81558 85284 88320 90620 94560 94760 98880 100864 101455 105472 105984 106605 108744 113472 113712 117760 118656 121746 126080 131840 132480 135930 141840 142140 144992 148320 151296 151616 158208 162328 163116 170568 176640 181240 182619 189120 189520 197760 201728 202910 203895 211968 213210 217488 226944 227424 237312 243492 252160 263680 264960 271860 283680 284280 289984 296640 302592 303232 304365 316416 324656 326232 341136 353280 362480 365238 378240 379040 395520 405820 407790 426420 434976 453888 454848 466693 474624 486984 504320 527360 529920 543720 567360 568560 579968 593280 605184 606464 608730 649312 652464 682272 724960 730476 756480 758080 791040 811640 815580 852840 869952 907776 909696 913095 933386 949248 973968 1008640 1059840 1087440 1134720 1137120 1159936 1186560 1212928 1217460 1298624 1304928 1364544 1400079 1449920 1460952 1512960 1516160 1582080 1623280 1631160 1705680 1739904 1815552 1819392 1826190 1866772 1947936 2174880 2269440 2274240 2319872 2333465 2373120 2425856 2434920 2597248 2609856 2729088 2800158 2899840 2921904 3025920 3032320 3246560 3262320 3411360 3479808 3638784 3652380 3733544 3895872 4200237 4349760 4538880 4548480 4639744 4666930 4746240 4869840 5194496 5219712 5458176 5600316 5799680 5843808 6064640 6493120 6524640 6822720 6959616 7000395 7277568 7304760 7467088 7791744 8400474 8699520 9077760 9096960 9333860 9739680 10388992 10439424 10916352 11200632 11599360 11687616 12129280 12986240 13049280 13645440 13919232 14000790 14609520 14934176 15583488 16800948 17399040 18193920 18667720 19479360 20777984 20878848 21001185 21832704 22401264 23198720 23375232 25972480 26098560 27290880 28001580 29219040 29868352 31166976 33601896 34798080 36387840 37335440 38958720 41757696 42002370 44802528 46750464 51944960 52197120 54581760 56003160 58438080 59736704 62333952 67203792 69596160 74670880 77917440 84004740 89605056 93500928 103889920 104394240 109163520 112006320 116876160 119473408 134407584 149341760 155834880 168009480 179210112 187001856 208788480 224012640 233752320 238946816 268815168 298683520 311669760 336018960 358420224 448025280 467504640 477893632 537630336 597367040 672037920 716840448 896050560 935009280 1075260672 1194734080 1344075840 1433680896 1792101120 2150521344 2389468160 2688151680 3584202240 4301042688 5376303360 7168404480 10752606720 21505213440
• Sum of all divisors σ(n): 78908214528
• Sum of proper divisors (its aliquot sum) s(n): 57403001088
• 21505213440 is an abundant number, because the sum of its proper divisors (57403001088) is greater than itself. Its abundance is 35897787648

Bases of 21505213440

• Binary: 10100000001110011111000010000000000₂
• Hexadecimal: 0x501CF8400
• Base-36: 9VNNCW0

Squares and roots of 21505213440

• 21505213440 squared (21505213440²) is 462474205099956633600
• 21505213440 cubed (21505213440³) is 9945606491168903940311875584000
• The square root of 21505213440 is 146646.5595914205
• The cube root of 21505213440 is 2780.8736208501

Scales and comparisons

• 21,505,213,440 seconds is equal to 683 years, 41 weeks, 3 days, 22 hours, 24 minutes.
• To count from 1 to 21,505,213,440 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 21505213440 cubic inches would be around 231.7 feet tall.

Recreational maths with 21505213440

• 21505213440 backwards is 04431250512
• The number of decimal digits it has is: 11
• The sum of 21505213440's digits is 27
• More coming soon!