18531990
18,531,990 is an even composite number composed of five prime numbers multiplied together.
18531990 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 18531990:
2 × 34 × 5 × 137 × 167
(2 × 3 × 3 × 3 × 3 × 5 × 137 × 167)See below for interesting mathematical facts about the number 18531990 from the Numbermatics database.
Names of 18531990
- Cardinal: 18531990 can be written as Eighteen million, five hundred thirty-one thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 1.853199 × 107
Factors of 18531990
Divisors of 18531990
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 3 5 6 9 10 15 18 27 30 45 54 81 90 135 137 162 167 270 274 334 405 411 501 685 810 822 835 1002 1233 1370 1503 1670 2055 2466 2505 3006 3699 4110 4509 5010 6165 7398 7515 9018 11097 12330 13527 15030 18495 22194 22545 22879 27054 36990 45090 45758 55485 67635 68637 110970 114395 135270 137274 205911 228790 343185 411822 617733 686370 1029555 1235466 1853199 2059110 3088665 3706398 6177330 9265995 18531990
- Sum of all divisors σ(n): 50494752
- Sum of proper divisors (its aliquot sum) s(n): 31962762
- 18531990 is an abundant number, because the sum of its proper divisors (31962762) is greater than itself. Its abundance is 13430772
Bases of 18531990
- Binary: 10001101011000110100101102
- Hexadecimal: 0x11AC696
- Base-36: B17DI
Squares and roots of 18531990
- 18531990 squared (185319902) is 343434653360100
- 18531990 cubed (185319903) is 6364527561722839599000
-
The
square root of 18531990 is 4304.8797892625 -
The
cube root of 18531990 is 264.6309803761
Scales and comparisons
How big is 18531990?- 18,531,990 seconds is equal to 30 weeks, 4 days, 11 hours, 46 minutes, 30 seconds.
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To count from 1 to 18,531,990 would take you about forty-five weeks!
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 18531990 cubic inches would be around 22.1 feet tall.
Recreational maths with 18531990
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The information we have on file for 18531990 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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