20721238720
20,721,238,720 is an even composite number composed of six prime numbers multiplied together.
20721238720 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred thirty-six divisors.
Prime factorization of 20721238720:
26 × 5 × 7 × 132 × 127 × 431
(2 × 2 × 2 × 2 × 2 × 2 × 5 × 7 × 13 × 13 × 127 × 431)See below for interesting mathematical facts about the number 20721238720 from the Numbermatics database.
Names of 20721238720
- Cardinal: 20721238720 can be written as Twenty billion, seven hundred twenty-one million, two hundred thirty-eight thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.072123872 × 1010
Factors of 20721238720
Divisors of 20721238720
- Number of divisors d(n): 336
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Complete list of divisors:
1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 64 65 70 80 91 104 112 127 130 140 160 169 182 208 224 254 260 280 320 338 364 416 431 448 455 508 520 560 635 676 728 832 845 862 889 910 1016 1040 1120 1183 1270 1352 1456 1651 1690 1724 1778 1820 2032 2080 2155 2240 2366 2540 2704 2912 3017 3302 3380 3448 3556 3640 4064 4160 4310 4445 4732 5080 5408 5603 5824 5915 6034 6604 6760 6896 7112 7280 8128 8255 8620 8890 9464 10160 10816 11206 11557 11830 12068 13208 13520 13792 14224 14560 15085 16510 17240 17780 18928 20320 21463 22412 23114 23660 24136 26416 27040 27584 28015 28448 29120 30170 33020 34480 35560 37856 39221 40640 42926 44824 46228 47320 48272 52832 54080 54737 56030 56896 57785 60340 66040 68960 71120 72839 75712 78442 85852 89648 92456 94640 96544 105664 107315 109474 112060 115570 120680 132080 137920 142240 145678 150241 156884 171704 179296 184912 189280 193088 196105 214630 218948 224120 231140 241360 264160 273685 284480 291356 300482 313768 343408 358592 364195 369824 378560 383159 392210 429260 437896 448240 462280 482720 509873 528320 547370 582712 600964 627536 686816 711581 728390 739648 751205 766318 784420 858520 875792 896480 924560 965440 1019746 1094740 1165424 1201928 1255072 1373632 1423162 1456780 1502410 1532636 1568840 1717040 1751584 1792960 1849120 1915795 2039492 2189480 2330848 2403856 2510144 2549365 2846324 2913560 3004820 3065272 3137680 3434080 3503168 3557905 3698240 3831590 4078984 4378960 4661696 4807712 4981067 5098730 5692648 5827120 6009640 6130544 6275360 6868160 7115810 7663180 8157968 8757920 9250553 9615424 9962134 10197460 11385296 11654240 12019280 12261088 12550720 14231620 15326360 16315936 17515840 18501106 19924268 20394920 22770592 23308480 24038560 24522176 24905335 28463240 30652720 32631872 37002212 39848536 40789840 45541184 46252765 48077120 49810670 56926480 61305440 64753871 74004424 79697072 81579680 92505530 99621340 113852960 122610880 129507742 148008848 159394144 163159360 185011060 199242680 227705920 259015484 296017696 318788288 323769355 370022120 398485360 518030968 592035392 647538710 740044240 796970720 1036061936 1295077420 1480088480 1593941440 2072123872 2590154840 2960176960 4144247744 5180309680 10360619360 20721238720
- Sum of all divisors σ(n): 61686448128
- Sum of proper divisors (its aliquot sum) s(n): 40965209408
- 20721238720 is an abundant number, because the sum of its proper divisors (40965209408) is greater than itself. Its abundance is 20243970688
Bases of 20721238720
- Binary: 100110100110001010100000010110000002
- Hexadecimal: 0x4D31502C0
- Base-36: 9IOW24G
Squares and roots of 20721238720
- 20721238720 squared (207212387202) is 429369734091227238400
- 20721238720 cubed (207212387203) is 8897072759247241864652750848000
-
The
square root of 20721238720 is 143948.7364307169 -
The
cube root of 20721238720 is 2746.6621196811
Scales and comparisons
How big is 20721238720?- 20,721,238,720 seconds is equal to 658 years, 45 weeks, 2 days, 3 hours, 38 minutes, 40 seconds.
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To count from 1 to 20,721,238,720 would take you about one thousand, three hundred seventeen 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 20721238720 cubic inches would be around 228.9 feet tall.
Recreational maths with 20721238720
- 20721238720 backwards is 02783212702
- The number of decimal digits it has is: 11
- The sum of 20721238720's digits is 34
- More coming soon!
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