21521430728
21,521,430,728 is an even composite number composed of four prime numbers multiplied together.
21521430728 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21521430728:
23 × 75 × 67 × 2389
(2 × 2 × 2 × 7 × 7 × 7 × 7 × 7 × 67 × 2389)See below for interesting mathematical facts about the number 21521430728 from the Numbermatics database.
Names of 21521430728
- Cardinal: 21521430728 can be written as Twenty-one billion, five hundred twenty-one million, four hundred thirty thousand, seven hundred twenty-eight.
Scientific notation
- Scientific notation: 2.1521430728 × 1010
Factors of 21521430728
Divisors of 21521430728
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 7 8 14 28 49 56 67 98 134 196 268 343 392 469 536 686 938 1372 1876 2389 2401 2744 3283 3752 4778 4802 6566 9556 9604 13132 16723 16807 19112 19208 22981 26264 33446 33614 45962 66892 67228 91924 117061 133784 134456 160063 160867 183848 234122 320126 321734 468244 640252 643468 819427 936488 1120441 1126069 1280504 1286936 1638854 2240882 2252138 3277708 4481764 4504276 5735989 6555416 7843087 8963528 9008552 11471978 15686174 22943956 31372348 40151923 45887912 54901609 62744696 80303846 109803218 160607692 219606436 321215384 384311263 439212872 768622526 1537245052 2690178841 3074490104 5380357682 10760715364 21521430728
- Sum of all divisors σ(n): 47800382400
- Sum of proper divisors (its aliquot sum) s(n): 26278951672
- 21521430728 is an abundant number, because the sum of its proper divisors (26278951672) is greater than itself. Its abundance is 4757520944
Bases of 21521430728
- Binary: 101000000101100011011111000110010002
- Hexadecimal: 0x502C6F8C8
- Base-36: 9VXAY88
Squares and roots of 21521430728
- 21521430728 squared (215214307282) is 463171980580102609984
- 21521430728 cubed (215214307283) is 9968123695205239575902657188352
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The
square root of 21521430728 is 146701.8429604755 -
The
cube root of 21521430728 is 2781.5724730445
Scales and comparisons
How big is 21521430728?- 21,521,430,728 seconds is equal to 684 years, 16 weeks, 2 days, 15 hours, 12 minutes, 8 seconds.
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To count from 1 to 21,521,430,728 would take you about one thousand, three hundred sixty-eight 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 21521430728 cubic inches would be around 231.8 feet tall.
Recreational maths with 21521430728
- 21521430728 backwards is 82703412512
- The number of decimal digits it has is: 11
- The sum of 21521430728's digits is 35
- More coming soon!
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The information we have on file for 21521430728 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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