21408921408
21,408,921,408 is an even composite number composed of six prime numbers multiplied together.
21408921408 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of two hundred twenty-four divisors.
Prime factorization of 21408921408:
26 × 3 × 7 × 31 × 73 × 7039
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 7 × 31 × 73 × 7039)See below for interesting mathematical facts about the number 21408921408 from the Numbermatics database.
Names of 21408921408
- Cardinal: 21408921408 can be written as Twenty-one billion, four hundred eight million, nine hundred twenty-one thousand, four hundred eight.
Scientific notation
- Scientific notation: 2.1408921408 × 1010
Factors of 21408921408
Divisors of 21408921408
- Number of divisors d(n): 224
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Complete list of divisors:
1 2 3 4 6 7 8 12 14 16 21 24 28 31 32 42 48 56 62 64 73 84 93 96 112 124 146 168 186 192 217 219 224 248 292 336 372 434 438 448 496 511 584 651 672 744 868 876 992 1022 1168 1302 1344 1488 1533 1736 1752 1984 2044 2263 2336 2604 2976 3066 3472 3504 4088 4526 4672 5208 5952 6132 6789 6944 7008 7039 8176 9052 10416 12264 13578 13888 14016 14078 15841 16352 18104 20832 21117 24528 27156 28156 31682 32704 36208 41664 42234 47523 49056 49273 54312 56312 63364 72416 84468 95046 98112 98546 108624 112624 126728 144832 147819 168936 190092 197092 217248 218209 225248 253456 295638 337872 380184 394184 434496 436418 450496 506912 513847 591276 654627 675744 760368 788368 872836 1013824 1027694 1182552 1309254 1351488 1520736 1527463 1541541 1576736 1745672 2055388 2365104 2618508 3041472 3054926 3083082 3153472 3491344 3596929 4110776 4582389 4730208 5237016 6109852 6166164 6982688 7193858 8221552 9164778 9460416 10474032 10790787 12219704 12332328 13965376 14387716 15929257 16443104 18329556 20948064 21581574 24439408 24664656 28775432 31858514 32886208 36659112 41896128 43163148 47787771 48878816 49329312 57550864 63717028 73318224 86326296 95575542 97757632 98658624 111504799 115101728 127434056 146636448 172652592 191151084 223009598 230203456 254868112 293272896 334514397 345305184 382302168 446019196 509736224 669028794 690610368 764604336 892038392 1019472448 1338057588 1529208672 1784076784 2676115176 3058417344 3568153568 5352230352 7136307136 10704460704 21408921408
- Sum of all divisors σ(n): 67749806080
- Sum of proper divisors (its aliquot sum) s(n): 46340884672
- 21408921408 is an abundant number, because the sum of its proper divisors (46340884672) is greater than itself. Its abundance is 24931963264
Bases of 21408921408
- Binary: 100111111000001001000110111010000002
- Hexadecimal: 0x4FC123740
- Base-36: 9U2BHHC
Squares and roots of 21408921408
- 21408921408 squared (214089214082) is 458341915853920702464
- 21408921408 cubed (214089214083) is 9812606054508737527715927949312
-
The
square root of 21408921408 is 146317.8779507139 -
The
cube root of 21408921408 is 2776.7168515259
Scales and comparisons
How big is 21408921408?- 21,408,921,408 seconds is equal to 680 years, 38 weeks, 2 days, 10 hours, 36 minutes, 48 seconds.
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To count from 1 to 21,408,921,408 would take you about one thousand, three hundred sixty-one 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 21408921408 cubic inches would be around 231.4 feet tall.
Recreational maths with 21408921408
- 21408921408 backwards is 80412980412
- The number of decimal digits it has is: 11
- The sum of 21408921408's digits is 39
- More coming soon!
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