21138687648
21,138,687,648 is an even composite number composed of five prime numbers multiplied together.
21138687648 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of three hundred twenty-four divisors.
Prime factorization of 21138687648:
25 × 32 × 132 × 232 × 821
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 13 × 13 × 23 × 23 × 821)See below for interesting mathematical facts about the number 21138687648 from the Numbermatics database.
Names of 21138687648
- Cardinal: 21138687648 can be written as Twenty-one billion, one hundred thirty-eight million, six hundred eighty-seven thousand, six hundred forty-eight.
Scientific notation
- Scientific notation: 2.1138687648 × 1010
Factors of 21138687648
Divisors of 21138687648
- Number of divisors d(n): 324
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Complete list of divisors:
1 2 3 4 6 8 9 12 13 16 18 23 24 26 32 36 39 46 48 52 69 72 78 92 96 104 117 138 144 156 169 184 207 208 234 276 288 299 312 338 368 414 416 468 507 529 552 598 624 676 736 821 828 897 936 1014 1058 1104 1196 1248 1352 1521 1587 1642 1656 1794 1872 2028 2116 2208 2392 2463 2691 2704 3042 3174 3284 3312 3588 3744 3887 4056 4232 4761 4784 4926 5382 5408 6084 6348 6568 6624 6877 7176 7389 7774 8112 8464 9522 9568 9852 10673 10764 11661 12168 12696 13136 13754 14352 14778 15548 16224 16928 18883 19044 19704 20631 21346 21528 23322 24336 25392 26272 27508 28704 29556 31096 32019 34983 37766 38088 39408 41262 42692 43056 46644 48672 50784 55016 56649 59112 61893 62192 64038 69966 75532 76176 78816 82524 85384 86112 89401 93288 96057 110032 113298 118224 123786 124384 128076 138749 139932 151064 152352 165048 169947 170768 178802 186576 192114 220064 226596 236448 245479 247572 256152 268203 277498 279864 302128 330096 339894 341536 357604 373152 384228 416247 434309 453192 490958 495144 512304 536406 554996 559728 604256 660192 679788 715208 736437 768456 804609 832494 868618 906384 981916 990288 1024608 1072812 1109992 1119456 1248741 1302927 1359576 1430416 1472874 1536912 1609218 1664988 1737236 1812768 1963832 1980576 2145624 2209311 2219984 2497482 2605854 2719152 2860832 2945748 3073824 3191227 3218436 3329976 3474472 3908781 3927664 4291248 4418622 4439968 4994964 5211708 5438304 5646017 5891496 6382454 6436872 6659952 6948944 7817562 7855328 8582496 8837244 9573681 9989928 10423416 11292034 11782992 12764908 12873744 13319904 13897888 15635124 16938051 17674488 19147362 19979856 20846832 22584068 23565984 25529816 25747488 28721043 31270248 33876102 35348976 38294724 39959712 41693664 45168136 50814153 51059632 57442086 62540496 67752204 70697952 73398221 76589448 90336272 101628306 102119264 114884172 125080992 135504408 146796442 153178896 180672544 203256612 220194663 229768344 271008816 293592884 306357792 406513224 440389326 459536688 542017632 587185768 660583989 813026448 880778652 919073376 1174371536 1321167978 1626052896 1761557304 2348743072 2642335956 3523114608 5284671912 7046229216 10569343824 21138687648
- Sum of all divisors σ(n): 68128988382
- Sum of proper divisors (its aliquot sum) s(n): 46990300734
- 21138687648 is an abundant number, because the sum of its proper divisors (46990300734) is greater than itself. Its abundance is 25851613086
Bases of 21138687648
- Binary: 100111010111111011011000110101000002
- Hexadecimal: 0x4EBF6C6A0
- Base-36: 9PLFFS0
Squares and roots of 21138687648
- 21138687648 squared (211386876482) is 446844115479707771904
- 21138687648 cubed (211386876483) is 9445698184472384272596686241792
-
The
square root of 21138687648 is 145391.4978532103 -
The
cube root of 21138687648 is 2764.9843266423
Scales and comparisons
How big is 21138687648?- 21,138,687,648 seconds is equal to 672 years, 7 weeks, 3 days, 17 hours, 40 minutes, 48 seconds.
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To count from 1 to 21,138,687,648 would take you about one thousand, three hundred forty-four 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 21138687648 cubic inches would be around 230.4 feet tall.
Recreational maths with 21138687648
- 21138687648 backwards is 84678683112
- The number of decimal digits it has is: 11
- The sum of 21138687648's digits is 54
- More coming soon!
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