21388015380
21,388,015,380 is an even composite number composed of seven prime numbers multiplied together.
21388015380 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred eighty-eight divisors.
Prime factorization of 21388015380:
22 × 3 × 5 × 192 × 31 × 53 × 601
(2 × 2 × 3 × 5 × 19 × 19 × 31 × 53 × 601)See below for interesting mathematical facts about the number 21388015380 from the Numbermatics database.
Names of 21388015380
- Cardinal: 21388015380 can be written as Twenty-one billion, three hundred eighty-eight million, fifteen thousand, three hundred eighty.
Scientific notation
- Scientific notation: 2.138801538 × 1010
Factors of 21388015380
Divisors of 21388015380
- Number of divisors d(n): 288
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Complete list of divisors:
1 2 3 4 5 6 10 12 15 19 20 30 31 38 53 57 60 62 76 93 95 106 114 124 155 159 186 190 212 228 265 285 310 318 361 372 380 465 530 570 589 601 620 636 722 795 930 1007 1060 1083 1140 1178 1202 1444 1590 1643 1767 1803 1805 1860 2014 2166 2356 2404 2945 3005 3021 3180 3286 3534 3606 3610 4028 4332 4929 5035 5415 5890 6010 6042 6572 7068 7212 7220 8215 8835 9015 9858 10070 10830 11191 11419 11780 12020 12084 15105 16430 17670 18030 18631 19133 19716 20140 21660 22382 22838 24645 30210 31217 31853 32860 33573 34257 35340 36060 37262 38266 44764 45676 49290 55893 55955 57095 57399 60420 62434 63706 67146 68514 74524 76532 93155 93651 95559 95665 98580 111786 111910 114190 114798 124868 127412 134292 137028 156085 159265 167865 171285 186310 187302 191118 191330 216961 223572 223820 228380 229596 279465 286995 312170 318530 335730 342570 353989 372620 374604 382236 382660 433922 468255 477795 558930 573990 593123 605207 624340 637060 650883 671460 685140 707978 867844 936510 955590 987443 1061967 1084805 1117860 1147980 1186246 1210414 1301766 1415956 1769945 1779369 1815621 1873020 1911180 1974886 2123934 2169610 2372492 2420828 2603532 2962329 2965615 3026035 3254415 3539890 3558738 3631242 3949772 4247868 4339220 4937215 5309835 5924658 5931230 6052070 6508830 6725791 7079780 7117476 7262484 8896845 9078105 9874430 10619670 11498933 11849316 11862460 12104140 13017660 13451582 14811645 17793690 18156210 18761417 19748860 20177373 21239340 22997866 26903164 29623290 33628955 34496799 35587380 36312420 37522834 40354746 45995732 56284251 57494665 59246580 67257910 68993598 75045668 80709492 93807085 100886865 112568502 114989330 134515820 137987196 172483995 187614170 201773730 225137004 229978660 281421255 344967990 356466923 375228340 403547460 562842510 689935980 712933846 1069400769 1125685020 1425867692 1782334615 2138801538 3564669230 4277603076 5347003845 7129338460 10694007690 21388015380
- Sum of all divisors σ(n): 66584706048
- Sum of proper divisors (its aliquot sum) s(n): 45196690668
- 21388015380 is an abundant number, because the sum of its proper divisors (45196690668) is greater than itself. Its abundance is 23808675288
Bases of 21388015380
- Binary: 100111110101101001100110111000101002
- Hexadecimal: 0x4FAD33714
- Base-36: 9TPVEAC
Squares and roots of 21388015380
- 21388015380 squared (213880153802) is 457447201895116544400
- 21388015380 cubed (213880153803) is 9783887789670717798519652872000
-
The
square root of 21388015380 is 146246.4200587487 -
The
cube root of 21388015380 is 2775.8127264821
Scales and comparisons
How big is 21388015380?- 21,388,015,380 seconds is equal to 680 years, 3 weeks, 5 days, 11 hours, 23 minutes.
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To count from 1 to 21,388,015,380 would take you about one thousand, three hundred sixty 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 21388015380 cubic inches would be around 231.3 feet tall.
Recreational maths with 21388015380
- 21388015380 backwards is 08351088312
- The number of decimal digits it has is: 11
- The sum of 21388015380's digits is 39
- More coming soon!
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