21358540
21,358,540 is an even composite number composed of five prime numbers multiplied together.
21358540 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 21358540:
22 × 5 × 7 × 41 × 612
(2 × 2 × 5 × 7 × 41 × 61 × 61)See below for interesting mathematical facts about the number 21358540 from the Numbermatics database.
Names of 21358540
- Cardinal: 21358540 can be written as Twenty-one million, three hundred fifty-eight thousand, five hundred forty.
Scientific notation
- Scientific notation: 2.135854 × 107
Factors of 21358540
Divisors of 21358540
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 4 5 7 10 14 20 28 35 41 61 70 82 122 140 164 205 244 287 305 410 427 574 610 820 854 1148 1220 1435 1708 2135 2501 2870 3721 4270 5002 5740 7442 8540 10004 12505 14884 17507 18605 25010 26047 35014 37210 50020 52094 70028 74420 87535 104188 130235 152561 175070 260470 305122 350140 520940 610244 762805 1067927 1525610 2135854 3051220 4271708 5339635 10679270 21358540
- Sum of all divisors σ(n): 53385696
- Sum of proper divisors (its aliquot sum) s(n): 32027156
- 21358540 is an abundant number, because the sum of its proper divisors (32027156) is greater than itself. Its abundance is 10668616
Bases of 21358540
- Binary: 10100010111100111110011002
- Hexadecimal: 0x145E7CC
- Base-36: CPSCS
Squares and roots of 21358540
- 21358540 squared (213585402) is 456187230931600
- 21358540 cubed (213585403) is 9743493219341815864000
-
The
square root of 21358540 is 4621.5300496697 -
The
cube root of 21358540 is 277.4537000373
Scales and comparisons
How big is 21358540?- 21,358,540 seconds is equal to 35 weeks, 2 days, 4 hours, 55 minutes, 40 seconds.
-
To count from 1 to 21,358,540 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 21358540 cubic inches would be around 23.1 feet tall.
Recreational maths with 21358540
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