21000798720

Names of 21000798720

• Cardinal: 21000798720 can be written as Twenty-one billion, seven hundred ninety-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.100079872 × 10¹⁰

Factors of 21000798720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 52

Divisors of 21000798720

• Number of divisors d(n): 960
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 27 30 31 32 33 36 40 44 45 48 54 55 60 62 64 66 72 80 81 88 90 93 96 99 108 110 120 121 124 128 132 135 144 155 160 162 165 176 180 186 192 198 216 220 240 242 243 248 256 264 270 279 288 297 310 320 324 330 341 352 360 363 372 384 396 405 432 440 465 480 484 486 495 496 512 528 540 558 576 594 605 620 640 648 660 682 704 720 726 729 744 768 792 810 837 864 880 891 930 960 968 972 990 992 1023 1056 1080 1089 1116 1152 1188 1210 1215 1240 1280 1296 1320 1364 1395 1408 1440 1452 1458 1485 1488 1536 1584 1620 1674 1705 1728 1760 1782 1815 1860 1920 1936 1944 1980 1984 2046 2112 2160 2178 2187 2232 2304 2376 2420 2430 2480 2511 2560 2592 2640 2673 2728 2790 2816 2880 2904 2916 2970 2976 3069 3168 3240 3267 3348 3410 3456 3520 3564 3630 3645 3720 3751 3840 3872 3888 3960 3968 4092 4185 4224 4320 4356 4374 4455 4464 4608 4752 4840 4860 4960 5022 5115 5184 5280 5346 5445 5456 5580 5632 5760 5808 5832 5940 5952 6138 6336 6480 6534 6696 6820 6912 7040 7128 7260 7290 7440 7502 7533 7680 7744 7776 7920 7936 8019 8184 8370 8448 8640 8712 8748 8910 8928 9207 9504 9680 9720 9801 9920 10044 10230 10368 10560 10692 10890 10912 10935 11160 11253 11520 11616 11664 11880 11904 12276 12555 12672 12960 13068 13365 13392 13640 13824 14080 14256 14520 14580 14880 15004 15066 15345 15488 15552 15840 15872 16038 16335 16368 16740 16896 17280 17424 17496 17820 17856 18414 18755 19008 19360 19440 19602 19840 20088 20460 20736 21120 21384 21780 21824 21870 22320 22506 22599 23040 23232 23328 23760 23808 24057 24552 25110 25344 25920 26136 26730 26784 27280 27621 28160 28512 29040 29160 29403 29760 30008 30132 30690 30976 31104 31680 32076 32670 32736 33480 33759 34560 34848 34992 35640 35712 36828 37510 37665 38016 38720 38880 39204 39680 40095 40176 40920 41472 42240 42768 43560 43648 43740 44640 45012 45198 46035 46464 46656 47520 47616 48114 49005 49104 50220 50688 51840 52272 53460 53568 54560 55242 56265 57024 58080 58320 58806 59520 60016 60264 61380 61952 62208 63360 64152 65340 65472 66960 67518 67797 69120 69696 69984 71280 71424 73656 75020 75330 76032 77440 77760 78408 79360 80190 80352 81840 82863 84480 85536 87120 87296 87480 88209 89280 90024 90396 92070 92928 93312 95040 96228 98010 98208 100440 101277 103680 104544 106920 107136 109120 110484 112530 112995 114048 116160 116640 117612 119040 120032 120285 120528 122760 124416 126720 128304 130680 130944 133920 135036 135594 138105 139392 139968 142560 142848 147015 147312 150040 150660 152064 154880 155520 156816 160380 160704 163680 165726 168795 171072 174240 174592 174960 176418 178560 180048 180792 184140 185856 186624 190080 192456 196020 196416 200880 202554 207360 209088 213840 214272 218240 220968 225060 225990 228096 232320 233280 235224 238080 240064 240570 241056 245520 248589 253440 256608 261360 261888 264627 267840 270072 271188 276210 278784 279936 285120 294030 294624 300080 301320 303831 309760 311040 313632 320760 321408 327360 331452 337590 338985 342144 348480 349920 352836 357120 360096 361584 368280 373248 380160 384912 392040 392832 401760 405108 414315 418176 427680 428544 436480 441045 441936 450120 451980 456192 464640 466560 470448 480128 481140 482112 491040 497178 506385 513216 522720 523776 529254 535680 540144 542376 552420 557568 559872 570240 588060 589248 600160 602640 607662 622080 627264 641520 642816 654720 662904 675180 677970 684288 696960 699840 705672 714240 720192 723168 736560 745767 760320 769824 784080 785664 803520 810216 828630 836352 855360 872960 882090 883872 900240 903960 911493 929280 933120 940896 960256 962280 964224 982080 994356 1012770 1026432 1045440 1058508 1071360 1080288 1084752 1104840 1119744 1140480 1176120 1178496 1200320 1205280 1215324 1242945 1254528 1283040 1285632 1309440 1323135 1325808 1350360 1355940 1368576 1393920 1399680 1411344 1440384 1446336 1473120 1491534 1519155 1539648 1568160 1571328 1607040 1620432 1657260 1672704 1710720 1764180 1767744 1800480 1807920 1822986 1866240 1881792 1920512 1924560 1928448 1964160 1988712 2025540 2052864 2090880 2117016 2142720 2160576 2169504 2209680 2280960 2352240 2356992 2400640 2410560 2430648 2485890 2509056 2566080 2618880 2646270 2651616 2700720 2711880 2734479 2787840 2799360 2822688 2880768 2892672 2946240 2983068 3038310 3079296 3136320 3214080 3240864 3314520 3421440 3528360 3535488 3600960 3615840 3645972 3728835 3763584 3849120 3856896 3928320 3977424 4051080 4105728 4181760 4234032 4321152 4339008 4419360 4557465 4704480 4713984 4801280 4821120 4861296 4971780 5018112 5132160 5292540 5303232 5401440 5423760 5468958 5598720 5645376 5761536 5785344 5892480 5966136 6076620 6158592 6272640 6428160 6481728 6629040 6842880 7056720 7070976 7201920 7231680 7291944 7457670 7527168 7698240 7856640 7954848 8102160 8203437 8363520 8468064 8642304 8678016 8838720 9114930 9408960 9602560 9642240 9722592 9943560 10264320 10585080 10606464 10802880 10847520 10937916 11290752 11570688 11784960 11932272 12153240 12317184 12545280 12963456 13258080 13672395 14113440 14141952 14403840 14463360 14583888 14915340 15054336 15396480 15909696 16204320 16406874 16936128 17284608 17356032 17677440 18229860 18817920 19284480 19445184 19887120 20528640 21170160 21212928 21605760 21695040 21875832 22581504 23569920 23864544 24306480 25090560 25926912 26516160 27344790 28226880 28807680 28926720 29167776 29830680 30792960 31819392 32408640 32813748 33872256 34712064 35354880 36459720 37635840 38890368 39774240 41017185 42340320 42425856 43211520 43390080 43751664 45163008 47729088 48612960 51853824 53032320 54689580 56453760 57853440 58335552 59661360 61585920 63638784 64817280 65627496 67744512 70709760 72919440 75271680 77780736 79548480 82034370 84680640 86423040 86780160 87503328 95458176 97225920 106064640 109379160 112907520 116671104 119322720 127277568 129634560 131254992 135489024 145838880 155561472 159096960 164068740 169361280 173560320 175006656 190916352 194451840 212129280 218758320 225815040 233342208 238645440 259269120 262509984 291677760 318193920 328137480 338722560 350013312 381832704 388903680 437516640 466684416 477290880 525019968 583355520 636387840 656274960 677445120 700026624 777807360 875033280 954581760 1050039936 1166711040 1312549920 1400053248 1750066560 1909163520 2100079872 2333422080 2625099840 3500133120 4200159744 5250199680 7000266240 10500399360 21000798720
• Sum of all divisors σ(n): 85684515840
• Sum of proper divisors (its aliquot sum) s(n): 64683717120
• 21000798720 is an abundant number, because the sum of its proper divisors (64683717120) is greater than itself. Its abundance is 43682918400

Bases of 21000798720

• Binary: 10011100011101111101100001000000000₂
• Hexadecimal: 0x4E3BEC200
• Base-36: 9NBC000

Squares and roots of 21000798720

• 21000798720 squared (21000798720²) is 441033546877953638400
• 21000798720 cubed (21000798720³) is 9262056746751588765530062848000
• The square root of 21000798720 is 144916.5232815085
• The cube root of 21000798720 is 2758.9591538411

Scales and comparisons

• 21,000,798,720 seconds is equal to 667 years, 39 weeks, 3 days, 19 hours, 12 minutes.
• To count from 1 to 21,000,798,720 would take you about one thousand, three hundred thirty-five 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 21000798720 cubic inches would be around 229.9 feet tall.

Recreational maths with 21000798720

• 21000798720 backwards is 02789700012
• 21000798720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21000798720's digits is 36
• More coming soon!