21285420
21,285,420 is an even composite number composed of six prime numbers multiplied together.
21285420 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21285420:
22 × 3 × 5 × 13 × 29 × 941
(2 × 2 × 3 × 5 × 13 × 29 × 941)See below for interesting mathematical facts about the number 21285420 from the Numbermatics database.
Names of 21285420
- Cardinal: 21285420 can be written as Twenty-one million, two hundred eighty-five thousand, four hundred twenty.
Scientific notation
- Scientific notation: 2.128542 × 107
Factors of 21285420
Divisors of 21285420
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 4 5 6 10 12 13 15 20 26 29 30 39 52 58 60 65 78 87 116 130 145 156 174 195 260 290 348 377 390 435 580 754 780 870 941 1131 1508 1740 1882 1885 2262 2823 3764 3770 4524 4705 5646 5655 7540 9410 11292 11310 12233 14115 18820 22620 24466 27289 28230 36699 48932 54578 56460 61165 73398 81867 109156 122330 136445 146796 163734 183495 244660 272890 327468 354757 366990 409335 545780 709514 733980 818670 1064271 1419028 1637340 1773785 2128542 3547570 4257084 5321355 7095140 10642710 21285420
- Sum of all divisors σ(n): 66467520
- Sum of proper divisors (its aliquot sum) s(n): 45182100
- 21285420 is an abundant number, because the sum of its proper divisors (45182100) is greater than itself. Its abundance is 23896680
Bases of 21285420
- Binary: 10100010011001010001011002
- Hexadecimal: 0x144CA2C
- Base-36: CO7XO
Squares and roots of 21285420
- 21285420 squared (212854202) is 453069104576400
- 21285420 cubed (212854203) is 9643766179932596088000
-
The
square root of 21285420 is 4613.6124674705 -
The
cube root of 21285420 is 277.1367212909
Scales and comparisons
How big is 21285420?- 21,285,420 seconds is equal to 35 weeks, 1 day, 8 hours, 37 minutes.
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To count from 1 to 21,285,420 would take you about five 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 21285420 cubic inches would be around 23.1 feet tall.
Recreational maths with 21285420
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The information we have on file for 21285420 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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