21309840
21,309,840 is an even composite number composed of five prime numbers multiplied together.
21309840 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty divisors.
Prime factorization of 21309840:
24 × 32 × 5 × 17 × 1741
(2 × 2 × 2 × 2 × 3 × 3 × 5 × 17 × 1741)See below for interesting mathematical facts about the number 21309840 from the Numbermatics database.
Names of 21309840
- Cardinal: 21309840 can be written as Twenty-one million, three hundred nine thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.130984 × 107
Factors of 21309840
Divisors of 21309840
- Number of divisors d(n): 120
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 30 34 36 40 45 48 51 60 68 72 80 85 90 102 120 136 144 153 170 180 204 240 255 272 306 340 360 408 510 612 680 720 765 816 1020 1224 1360 1530 1741 2040 2448 3060 3482 4080 5223 6120 6964 8705 10446 12240 13928 15669 17410 20892 26115 27856 29597 31338 34820 41784 52230 59194 62676 69640 78345 83568 88791 104460 118388 125352 139280 147985 156690 177582 208920 236776 250704 266373 295970 313380 355164 417840 443955 473552 532746 591940 626760 710328 887910 1065492 1183880 1253520 1331865 1420656 1775820 2130984 2367760 2663730 3551640 4261968 5327460 7103280 10654920 21309840
- Sum of all divisors σ(n): 75818808
- Sum of proper divisors (its aliquot sum) s(n): 54508968
- 21309840 is an abundant number, because the sum of its proper divisors (54508968) is greater than itself. Its abundance is 33199128
Bases of 21309840
- Binary: 10100010100101001100100002
- Hexadecimal: 0x1452990
- Base-36: COQS0
Squares and roots of 21309840
- 21309840 squared (213098402) is 454109280825600
- 21309840 cubed (213098403) is 9676996116908603904000
-
The
square root of 21309840 is 4616.2582250129 -
The
cube root of 21309840 is 277.2426637981
Scales and comparisons
How big is 21309840?- 21,309,840 seconds is equal to 35 weeks, 1 day, 15 hours, 24 minutes.
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To count from 1 to 21,309,840 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 21309840 cubic inches would be around 23.1 feet tall.
Recreational maths with 21309840
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The information we have on file for 21309840 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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