21075390
21,075,390 is an even composite number composed of five prime numbers multiplied together.
21075390 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty-eight divisors.
Prime factorization of 21075390:
2 × 36 × 5 × 72 × 59
(2 × 3 × 3 × 3 × 3 × 3 × 3 × 5 × 7 × 7 × 59)See below for interesting mathematical facts about the number 21075390 from the Numbermatics database.
Names of 21075390
- Cardinal: 21075390 can be written as Twenty-one million, seventy-five thousand, three hundred ninety.
Scientific notation
- Scientific notation: 2.107539 × 107
Factors of 21075390
Divisors of 21075390
- Number of divisors d(n): 168
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Complete list of divisors:
1 2 3 5 6 7 9 10 14 15 18 21 27 30 35 42 45 49 54 59 63 70 81 90 98 105 118 126 135 147 162 177 189 210 243 245 270 294 295 315 354 378 405 413 441 486 490 531 567 590 630 729 735 810 826 882 885 945 1062 1134 1215 1239 1323 1458 1470 1593 1701 1770 1890 2065 2205 2430 2478 2646 2655 2835 2891 3186 3402 3645 3717 3969 4130 4410 4779 5103 5310 5670 5782 6195 6615 7290 7434 7938 7965 8505 8673 9558 10206 11151 11907 12390 13230 14337 14455 15930 17010 17346 18585 19845 22302 23814 23895 25515 26019 28674 28910 33453 35721 37170 39690 43011 43365 47790 51030 52038 55755 59535 66906 71442 71685 78057 86022 86730 100359 111510 119070 130095 143370 156114 167265 178605 200718 215055 234171 260190 301077 334530 357210 390285 430110 468342 501795 602154 702513 780570 1003590 1170855 1405026 1505385 2107539 2341710 3010770 3512565 4215078 7025130 10537695 21075390
- Sum of all divisors σ(n): 67285080
- Sum of proper divisors (its aliquot sum) s(n): 46209690
- 21075390 is an abundant number, because the sum of its proper divisors (46209690) is greater than itself. Its abundance is 25134300
Bases of 21075390
- Binary: 10100000110010101101111102
- Hexadecimal: 0x14195BE
- Base-36: CJPVI
Squares and roots of 21075390
- 21075390 squared (210753902) is 444172063652100
- 21075390 cubed (210753903) is 9361099468572831819000
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The
square root of 21075390 is 4590.7940489637 -
The
cube root of 21075390 is 276.2221746029
Scales and comparisons
How big is 21075390?- 21,075,390 seconds is equal to 34 weeks, 5 days, 22 hours, 16 minutes, 30 seconds.
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To count from 1 to 21,075,390 would take you about twenty-one 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 21075390 cubic inches would be around 23 feet tall.
Recreational maths with 21075390
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