21065008720
21,065,008,720 is an even composite number composed of seven prime numbers multiplied together.
21065008720 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 21065008720:
24 × 5 × 7 × 17 × 37 × 79 × 757
(2 × 2 × 2 × 2 × 5 × 7 × 17 × 37 × 79 × 757)See below for interesting mathematical facts about the number 21065008720 from the Numbermatics database.
Names of 21065008720
- Cardinal: 21065008720 can be written as Twenty-one billion, sixty-five million, eight thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.106500872 × 1010
Factors of 21065008720
Divisors of 21065008720
- Number of divisors d(n): 320
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Complete list of divisors:
1 2 4 5 7 8 10 14 16 17 20 28 34 35 37 40 56 68 70 74 79 80 85 112 119 136 140 148 158 170 185 238 259 272 280 296 316 340 370 395 476 518 553 560 592 595 629 632 680 740 757 790 952 1036 1106 1190 1258 1264 1295 1343 1360 1480 1514 1580 1904 2072 2212 2380 2516 2590 2686 2765 2923 2960 3028 3145 3160 3785 4144 4403 4424 4760 5032 5180 5299 5372 5530 5846 6056 6290 6320 6715 7570 8806 8848 9401 9520 10064 10360 10598 10744 11060 11692 12112 12580 12869 13430 14615 15140 17612 18802 20461 20720 21196 21488 22015 22120 23384 25160 25738 26495 26860 28009 29230 30280 35224 37604 40922 42392 44030 44240 46768 47005 49691 50320 51476 52990 53720 56018 58460 59803 60560 64345 70448 75208 81844 84784 88060 90083 94010 99382 102305 102952 105980 107440 112036 116920 119606 128690 140045 150416 163688 176120 180166 188020 196063 198764 204610 205904 211960 224072 233840 239212 248455 257380 280090 299015 327376 347837 352240 360332 376040 392126 397528 409220 418621 423920 448144 450415 476153 478424 496910 514760 560180 598030 695674 720664 752080 784252 795056 818440 837242 900830 952306 956848 980315 993820 1016651 1029520 1120360 1196060 1391348 1441328 1568504 1636880 1674484 1739185 1801660 1904612 1960630 1987640 2033302 2093105 2212711 2240720 2380765 2392120 2782696 3137008 3333071 3348968 3478370 3603320 3809224 3921260 3975280 4066604 4186210 4425422 4761530 4784240 5083255 5565392 6666142 6697936 6956740 7116557 7206640 7618448 7842520 8133208 8372420 8850844 9523060 10166510 11063555 13332284 13913480 14233114 15488977 15685040 16266416 16665355 16744840 17701688 19046120 20333020 22127110 26664568 27826960 28466228 30977954 33330710 33489680 35403376 35582785 37616087 38092240 40666040 44254220 53329136 56932456 61955908 66661420 71165570 75232174 77444885 81332080 88508440 113864912 123911816 133322840 142331140 150464348 154889770 177016880 188080435 247823632 263312609 266645680 284662280 300928696 309779540 376160870 526625218 569324560 601857392 619559080 752321740 1053250436 1239118160 1316563045 1504643480 2106500872 2633126090 3009286960 4213001744 5266252180 10532504360 21065008720
- Sum of all divisors σ(n): 61718906880
- Sum of proper divisors (its aliquot sum) s(n): 40653898160
- 21065008720 is an abundant number, because the sum of its proper divisors (40653898160) is greater than itself. Its abundance is 19588889440
Bases of 21065008720
- Binary: 100111001111001001010000110010100002
- Hexadecimal: 0x4E7928650
- Base-36: 9ODK8R4
Squares and roots of 21065008720
- 21065008720 squared (210650087202) is 443734592373676038400
- 21065008720 cubed (210650087203) is 9347273057717131247351054848000
-
The
square root of 21065008720 is 145137.8955338681 -
The
cube root of 21065008720 is 2761.7681347015
Scales and comparisons
How big is 21065008720?- 21,065,008,720 seconds is equal to 669 years, 41 weeks, 4 days, 23 hours, 18 minutes, 40 seconds.
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To count from 1 to 21,065,008,720 would take you about one thousand, three hundred thirty-nine 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 21065008720 cubic inches would be around 230.1 feet tall.
Recreational maths with 21065008720
- 21065008720 backwards is 02780056012
- The number of decimal digits it has is: 11
- The sum of 21065008720's digits is 31
- More coming soon!
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