21204720840
21,204,720,840 is an even composite number composed of seven prime numbers multiplied together.
21204720840 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 21204720840:
23 × 3 × 5 × 17 × 71 × 281 × 521
(2 × 2 × 2 × 3 × 5 × 17 × 71 × 281 × 521)See below for interesting mathematical facts about the number 21204720840 from the Numbermatics database.
Names of 21204720840
- Cardinal: 21204720840 can be written as Twenty-one billion, two hundred four million, seven hundred twenty thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.120472084 × 1010
Factors of 21204720840
Divisors of 21204720840
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 17 20 24 30 34 40 51 60 68 71 85 102 120 136 142 170 204 213 255 281 284 340 355 408 426 510 521 562 568 680 710 843 852 1020 1042 1065 1124 1207 1405 1420 1563 1686 1704 2040 2084 2130 2248 2414 2605 2810 2840 3126 3372 3621 4168 4215 4260 4777 4828 5210 5620 6035 6252 6744 7242 7815 8430 8520 8857 9554 9656 10420 11240 12070 12504 14331 14484 15630 16860 17714 18105 19108 19951 20840 23885 24140 26571 28662 28968 31260 33720 35428 36210 36991 38216 39902 44285 47770 48280 53142 57324 59853 62520 70856 71655 72420 73982 79804 88570 95540 99755 106284 110973 114648 119706 132855 143310 144840 146401 147964 159608 177140 184955 191080 199510 212568 221946 239412 265710 286620 292802 295928 299265 339167 354280 369910 399020 439203 443892 478824 531420 554865 573240 585604 598530 628847 678334 732005 739820 798040 878406 887784 1017501 1062840 1109730 1171208 1197060 1257694 1356668 1464010 1479640 1695835 1756812 1886541 2035002 2196015 2219460 2394120 2488817 2515388 2713336 2928020 3144235 3391670 3513624 3773082 4070004 4392030 4438920 4977634 5030776 5087505 5856040 6288470 6783340 7466451 7546164 8140008 8784060 9432705 9955268 10175010 10394471 12444085 12576940 13566680 14932902 15092328 17568120 18865410 19910536 20350020 20788942 24888170 25153880 29865804 31183413 37332255 37730820 40700040 41577884 49776340 51972355 59731608 62366826 74664510 75461640 83155768 99552680 103944710 124733652 149329020 155917065 176706007 207889420 249467304 298658040 311834130 353412014 415778840 530118021 623668260 706824028 883530035 1060236042 1247336520 1413648056 1767060070 2120472084 2650590105 3534120140 4240944168 5301180210 7068240280 10602360420 21204720840
- Sum of all divisors σ(n): 68679498240
- Sum of proper divisors (its aliquot sum) s(n): 47474777400
- 21204720840 is an abundant number, because the sum of its proper divisors (47474777400) is greater than itself. Its abundance is 26270056560
Bases of 21204720840
- Binary: 100111011111110011001011100110010002
- Hexadecimal: 0x4EFE65CC8
- Base-36: 9QOQRBC
Squares and roots of 21204720840
- 21204720840 squared (212047208402) is 449640185902330305600
- 21204720840 cubed (212047208403) is 9534494620504617635719888704000
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The
square root of 21204720840 is 145618.4083143337 -
The
cube root of 21204720840 is 2767.8604268921
Scales and comparisons
How big is 21204720840?- 21,204,720,840 seconds is equal to 674 years, 12 weeks, 5 days, 14 minutes.
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To count from 1 to 21,204,720,840 would take you about one thousand, three hundred forty-eight years!
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 21204720840 cubic inches would be around 230.7 feet tall.
Recreational maths with 21204720840
- 21204720840 backwards is 04802740212
- 21204720840 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21204720840's digits is 30
- More coming soon!
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The information we have on file for 21204720840 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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