21356490
21,356,490 is an even composite number composed of six prime numbers multiplied together.
21356490 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21356490:
2 × 3 × 5 × 41 × 97 × 179
See below for interesting mathematical facts about the number 21356490 from the Numbermatics database.
Names of 21356490
- Cardinal: 21356490 can be written as Twenty-one million, three hundred fifty-six thousand, four hundred ninety.
Scientific notation
- Scientific notation: 2.135649 × 107
Factors of 21356490
Divisors of 21356490
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 5 6 10 15 30 41 82 97 123 179 194 205 246 291 358 410 485 537 582 615 895 970 1074 1230 1455 1790 2685 2910 3977 5370 7339 7954 11931 14678 17363 19885 22017 23862 34726 36695 39770 44034 52089 59655 73390 86815 104178 110085 119310 173630 220170 260445 520890 711883 1423766 2135649 3559415 4271298 7118830 10678245 21356490
- Sum of all divisors σ(n): 53343360
- Sum of proper divisors (its aliquot sum) s(n): 31986870
- 21356490 is an abundant number, because the sum of its proper divisors (31986870) is greater than itself. Its abundance is 10630380
Bases of 21356490
- Binary: 10100010111011111110010102
- Hexadecimal: 0x145DFCA
- Base-36: CPQRU
Squares and roots of 21356490
- 21356490 squared (213564902) is 456099665120100
- 21356490 cubed (213564903) is 9740687937140764449000
-
The
square root of 21356490 is 4621.3082563275 -
The
cube root of 21356490 is 277.4448230527
Scales and comparisons
How big is 21356490?- 21,356,490 seconds is equal to 35 weeks, 2 days, 4 hours, 21 minutes, 30 seconds.
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To count from 1 to 21,356,490 would take you about six days!
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 21356490 cubic inches would be around 23.1 feet tall.
Recreational maths with 21356490
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