21393216
21,393,216 is an even composite number composed of four prime numbers multiplied together.
21393216 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of eighty-four divisors.
Prime factorization of 21393216:
26 × 32 × 13 × 2857
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 13 × 2857)See below for interesting mathematical facts about the number 21393216 from the Numbermatics database.
Names of 21393216
- Cardinal: 21393216 can be written as Twenty-one million, three hundred ninety-three thousand, two hundred sixteen.
Scientific notation
- Scientific notation: 2.1393216 × 107
Factors of 21393216
Divisors of 21393216
- Number of divisors d(n): 84
-
Complete list of divisors:
1 2 3 4 6 8 9 12 13 16 18 24 26 32 36 39 48 52 64 72 78 96 104 117 144 156 192 208 234 288 312 416 468 576 624 832 936 1248 1872 2496 2857 3744 5714 7488 8571 11428 17142 22856 25713 34284 37141 45712 51426 68568 74282 91424 102852 111423 137136 148564 182848 205704 222846 274272 297128 334269 411408 445692 548544 594256 668538 822816 891384 1188512 1337076 1645632 1782768 2377024 2674152 3565536 5348304 7131072 10696608 21393216
- Sum of all divisors σ(n): 66059812
- Sum of proper divisors (its aliquot sum) s(n): 44666596
- 21393216 is an abundant number, because the sum of its proper divisors (44666596) is greater than itself. Its abundance is 23273380
Bases of 21393216
- Binary: 10100011001101111010000002
- Hexadecimal: 0x1466F40
- Base-36: CQJ40
Squares and roots of 21393216
- 21393216 squared (213932162) is 457669690822656
- 21393216 cubed (213932163) is 9791026552422297501696
-
The
square root of 21393216 is 4625.2800996263 -
The
cube root of 21393216 is 277.6037693237
Scales and comparisons
How big is 21393216?- 21,393,216 seconds is equal to 35 weeks, 2 days, 14 hours, 33 minutes, 36 seconds.
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To count from 1 to 21,393,216 would take you about nine hours!
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 21393216 cubic inches would be around 23.1 feet tall.
Recreational maths with 21393216
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The information we have on file for 21393216 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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