21351220785720
21,351,220,785,720 is an even composite number composed of seven prime numbers multiplied together.
21351220785720 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 21351220785720:
23 × 32 × 5 × 7 × 281 × 3121 × 9661
(2 × 2 × 2 × 3 × 3 × 5 × 7 × 281 × 3121 × 9661)See below for interesting mathematical facts about the number 21351220785720 from the Numbermatics database.
Names of 21351220785720
- Cardinal: 21351220785720 can be written as Twenty-one trillion, three hundred fifty-one billion, two hundred twenty million, seven hundred eighty-five thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.135122078572 × 1013
Factors of 21351220785720
Divisors of 21351220785720
- Number of divisors d(n): 384
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Complete list of divisors:
1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 56 60 63 70 72 84 90 105 120 126 140 168 180 210 252 280 281 315 360 420 504 562 630 840 843 1124 1260 1405 1686 1967 2248 2520 2529 2810 3121 3372 3934 4215 5058 5620 5901 6242 6744 7868 8430 9363 9661 9835 10116 11240 11802 12484 12645 15605 15736 16860 17703 18726 19322 19670 20232 21847 23604 24968 25290 28089 28983 29505 31210 33720 35406 37452 38644 39340 43694 46815 47208 48305 50580 56178 57966 59010 62420 65541 67627 70812 74904 77288 78680 86949 87388 88515 93630 96610 101160 109235 112356 115932 118020 124840 131082 135254 140445 141624 144915 173898 174776 177030 187260 193220 196623 202881 218470 224712 231864 236040 262164 270508 280890 289830 327705 338135 347796 354060 374520 386440 393246 405762 434745 436940 524328 541016 561780 579660 608643 655410 676270 695592 708120 786492 811524 869490 873880 877001 983115 1014405 1123560 1159320 1217286 1310820 1352540 1572984 1623048 1738980 1754002 1966230 2028810 2434572 2621640 2631003 2705080 2714741 3043215 3477960 3508004 3932460 4057620 4385005 4869144 5262006 5429482 6086430 6139007 7016008 7864920 7893009 8115240 8144223 8770010 10524012 10858964 12172860 12278014 13155015 13573705 15786018 16288446 17540020 18417021 19003187 21048024 21717928 24345720 24432669 24556028 26310030 27147410 30151981 30695035 31572036 32576892 35080040 36834042 38006374 39465045 40721115 48865338 49112056 52620060 54294820 55251063 57009561 60303962 61390070 63144072 65153784 73668084 76012748 78930090 81442230 90455943 92085105 95015935 97730676 105240120 108589640 110502126 114019122 120607924 122163345 122780140 147336168 150759905 152025496 157860180 162884460 171028683 180911886 184170210 190031870 195461352 211063867 221004252 228038244 241215848 244326690 245560280 271367829 276255315 285047805 301519810 315720360 325768920 342057366 361823772 368340420 380063740 422127734 442008504 452279715 456076488 488653380 542735658 552510630 570095610 603039620 633191601 684114732 723647544 736680840 760127480 844255468 855143415 904559430 977306760 1055319335 1085471316 1105021260 1140191220 1206079240 1266383202 1356839145 1368229464 1688510936 1710286830 1809118860 1899574803 2110638670 2170942632 2210042520 2280382440 2532766404 2713678290 3165958005 3420573660 3618237720 3799149606 4221277340 5065532808 5427356580 6331916010 6841147320 7598299212 8442554680 8472706661 9497874015 10854713160 12663832020 15196598424 16945413322 18995748030 25327664040 25418119983 33890826644 37991496060 42363533305 50836239966 59308946627 67781653288 75982992120 76254359949 84727066610 101672479932 118617893254 127090599915 152508719898 169454133220 177926839881 203344959864 237235786508 254181199830 296544733135 305017439796 338908266440 355853679762 381271799745 474471573016 508362399660 533780519643 593089466270 610034879592 711707359524 762543599490 889634199405 1016724799320 1067561039286 1186178932540 1423414719048 1525087198980 1779268398810 2135122078572 2372357865080 2668902598215 3050174397960 3558536797620 4270244157144 5337805196430 7117073595240 10675610392860 21351220785720
- Sum of all divisors σ(n): 79620497873280
- Sum of proper divisors (its aliquot sum) s(n): 58269277087560
- 21351220785720 is an abundant number, because the sum of its proper divisors (58269277087560) is greater than itself. Its abundance is 36918056301840
Bases of 21351220785720
- Binary: 1001101101011001101111110111000110010001110002
- Hexadecimal: 0x136B37EE3238
- Base-36: 7KGM5L0E0
Squares and roots of 21351220785720
- 21351220785720 squared (213512207857202) is 455874629040561774155918400
- 21351220785720 cubed (213512207857203) is 9733479855253236893343525250236205248000
-
The
square root of 21351220785720 is 4620738.1213091919 -
The
cube root of 21351220785720 is 27742.2003502829
Scales and comparisons
How big is 21351220785720?- 21,351,220,785,720 seconds is equal to 678,902 years, 40 weeks, 2 days, 22 hours, 42 minutes.
-
To count from 1 to 21,351,220,785,720 would take you about one million, six hundred ninety-seven thousand, two hundred fifty-six 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 21351220785720 cubic inches would be around 2311.9 feet tall.
Recreational maths with 21351220785720
- 21351220785720 backwards is 02758702215312
- 21351220785720 is a
Harshad number . - The number of decimal digits it has is: 14
- The sum of 21351220785720's digits is 45
- More coming soon!
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