21008520
21,008,520 is an even composite number composed of five prime numbers multiplied together.
21008520 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 21008520:
23 × 32 × 5 × 13 × 672
(2 × 2 × 2 × 3 × 3 × 5 × 13 × 67 × 67)See below for interesting mathematical facts about the number 21008520 from the Numbermatics database.
Names of 21008520
- Cardinal: 21008520 can be written as Twenty-one million, eight thousand, five hundred twenty.
Scientific notation
- Scientific notation: 2.100852 × 107
Factors of 21008520
Divisors of 21008520
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 13 15 18 20 24 26 30 36 39 40 45 52 60 65 67 72 78 90 104 117 120 130 134 156 180 195 201 234 260 268 312 335 360 390 402 468 520 536 585 603 670 780 804 871 936 1005 1170 1206 1340 1560 1608 1742 2010 2340 2412 2613 2680 3015 3484 4020 4355 4489 4680 4824 5226 6030 6968 7839 8040 8710 8978 10452 12060 13065 13467 15678 17420 17956 20904 22445 24120 26130 26934 31356 34840 35912 39195 40401 44890 52260 53868 58357 62712 67335 78390 80802 89780 104520 107736 116714 134670 156780 161604 175071 179560 202005 233428 269340 291785 313560 323208 350142 404010 466856 525213 538680 583570 700284 808020 875355 1050426 1167140 1400568 1616040 1750710 2100852 2334280 2626065 3501420 4201704 5252130 7002840 10504260 21008520
- Sum of all divisors σ(n): 74643660
- Sum of proper divisors (its aliquot sum) s(n): 53635140
- 21008520 is an abundant number, because the sum of its proper divisors (53635140) is greater than itself. Its abundance is 32626620
Bases of 21008520
- Binary: 10100000010010000100010002
- Hexadecimal: 0x1409088
- Base-36: CIAA0
Squares and roots of 21008520
- 21008520 squared (210085202) is 441357912590400
- 21008520 cubed (210085203) is 9272276533813670208000
-
The
square root of 21008520 is 4583.5052088985 -
The
cube root of 21008520 is 275.9297237583
Scales and comparisons
How big is 21008520?- 21,008,520 seconds is equal to 34 weeks, 5 days, 3 hours, 42 minutes.
-
To count from 1 to 21,008,520 would take you about seventeen 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 21008520 cubic inches would be around 23 feet tall.
Recreational maths with 21008520
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The information we have on file for 21008520 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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