21123900
21,123,900 is an even composite number composed of five prime numbers multiplied together.
21123900 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty-two divisors.
Prime factorization of 21123900:
22 × 32 × 52 × 72 × 479
(2 × 2 × 3 × 3 × 5 × 5 × 7 × 7 × 479)See below for interesting mathematical facts about the number 21123900 from the Numbermatics database.
Names of 21123900
- Cardinal: 21123900 can be written as Twenty-one million, one hundred twenty-three thousand, nine hundred.
Scientific notation
- Scientific notation: 2.11239 × 107
Factors of 21123900
Divisors of 21123900
- Number of divisors d(n): 162
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Complete list of divisors:
1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 25 28 30 35 36 42 45 49 50 60 63 70 75 84 90 98 100 105 126 140 147 150 175 180 196 210 225 245 252 294 300 315 350 420 441 450 479 490 525 588 630 700 735 882 900 958 980 1050 1225 1260 1437 1470 1575 1764 1916 2100 2205 2395 2450 2874 2940 3150 3353 3675 4311 4410 4790 4900 5748 6300 6706 7185 7350 8622 8820 9580 10059 11025 11975 13412 14370 14700 16765 17244 20118 21555 22050 23471 23950 28740 30177 33530 35925 40236 43110 44100 46942 47900 50295 60354 67060 70413 71850 83825 86220 93884 100590 107775 117355 120708 140826 143700 150885 167650 201180 211239 215550 234710 251475 281652 301770 335300 352065 422478 431100 469420 502950 586775 603540 704130 754425 844956 1005900 1056195 1173550 1408260 1508850 1760325 2112390 2347100 3017700 3520650 4224780 5280975 7041300 10561950 21123900
- Sum of all divisors σ(n): 77182560
- Sum of proper divisors (its aliquot sum) s(n): 56058660
- 21123900 is an abundant number, because the sum of its proper divisors (56058660) is greater than itself. Its abundance is 34934760
Bases of 21123900
- Binary: 10100001001010011001111002
- Hexadecimal: 0x142533C
- Base-36: CKRB0
Squares and roots of 21123900
- 21123900 squared (211239002) is 446219151210000
- 21123900 cubed (211239003) is 9425888728244919000000
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The
square root of 21123900 is 4596.0744119303 -
The
cube root of 21123900 is 276.4339424529
Scales and comparisons
How big is 21123900?- 21,123,900 seconds is equal to 34 weeks, 6 days, 11 hours, 45 minutes.
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To count from 1 to 21,123,900 would take you about two 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 21123900 cubic inches would be around 23 feet tall.
Recreational maths with 21123900
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The information we have on file for 21123900 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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