21181317920
21,181,317,920 is an even composite number composed of seven prime numbers multiplied together.
21181317920 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 21181317920:
25 × 5 × 7 × 31 × 61 × 73 × 137
(2 × 2 × 2 × 2 × 2 × 5 × 7 × 31 × 61 × 73 × 137)See below for interesting mathematical facts about the number 21181317920 from the Numbermatics database.
Names of 21181317920
- Cardinal: 21181317920 can be written as Twenty-one billion, one hundred eighty-one million, three hundred seventeen thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.118131792 × 1010
Factors of 21181317920
Divisors of 21181317920
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 31 32 35 40 56 61 62 70 73 80 112 122 124 137 140 146 155 160 217 224 244 248 274 280 292 305 310 365 427 434 488 496 511 548 560 584 610 620 685 730 854 868 959 976 992 1022 1085 1096 1120 1168 1220 1240 1370 1460 1708 1736 1891 1918 1952 2044 2135 2170 2192 2263 2336 2440 2480 2555 2740 2920 3416 3472 3782 3836 4088 4247 4270 4340 4384 4453 4526 4795 4880 4960 5110 5480 5840 6832 6944 7564 7672 8176 8357 8494 8540 8680 8906 9052 9455 9590 9760 10001 10220 10960 11315 11680 13237 13664 15128 15344 15841 16352 16714 16988 17080 17360 17812 18104 18910 19180 20002 20440 21235 21920 22265 22630 26474 29729 30256 30688 31171 31682 33428 33976 34160 34720 35624 36208 37820 38360 40004 40880 41785 42470 44530 45260 50005 52948 58499 59458 60512 62342 63364 66185 66856 67952 68320 70007 71248 72416 75640 76720 79205 80008 81760 83570 84940 89060 90520 100010 105896 116998 118916 124684 126728 132370 133712 135904 138043 140014 142496 148645 151280 153440 155855 158410 160016 167140 169880 178120 181040 200020 211792 233996 237832 249368 253456 259067 264740 267424 276086 280028 292495 297290 302560 310031 311710 316820 320032 334280 339760 350035 356240 362080 400040 423584 467992 475664 498736 506912 518134 529480 552172 560056 584990 594580 610061 620062 623420 633640 668560 679520 690215 700070 712480 800080 935984 951328 966301 997472 1036268 1058960 1104344 1120112 1169980 1189160 1220122 1240124 1246840 1267280 1295335 1337120 1380430 1400140 1550155 1600160 1813469 1871968 1932602 2072536 2117920 2170217 2208688 2240224 2339960 2378320 2440244 2480248 2493680 2534560 2590670 2760860 2800280 3050305 3100310 3626938 3865204 4145072 4270427 4340434 4417376 4679920 4756640 4831505 4880488 4960496 4987360 5181340 5521720 5600560 6100610 6200620 7253876 7730408 8290144 8540854 8680868 9067345 9359840 9663010 9760976 9920992 10362680 10851085 11043440 11201120 12201220 12401240 14507752 15460816 17081708 17361736 18134690 18911891 19326020 19521952 20725360 21352135 21702170 22086880 24402440 24802480 29015504 30921632 34163416 34723472 36269380 37823782 38652040 41450720 42704270 43404340 48804880 49604960 58031008 68326832 69446944 72538760 75647564 77304080 85408540 86808680 94559455 97609760 132383237 136653664 145077520 151295128 154608160 170817080 173617360 189118910 264766474 290155040 302590256 341634160 347234720 378237820 529532948 605180512 661916185 683268320 756475640 1059065896 1323832370 1512951280 2118131792 2647664740 3025902560 4236263584 5295329480 10590658960 21181317920
- Sum of all divisors σ(n): 61268078592
- Sum of proper divisors (its aliquot sum) s(n): 40086760672
- 21181317920 is an abundant number, because the sum of its proper divisors (40086760672) is greater than itself. Its abundance is 18905442752
Bases of 21181317920
- Binary: 100111011101000000101000011001000002
- Hexadecimal: 0x4EE814320
- Base-36: 9QAT5I8
Squares and roots of 21181317920
- 21181317920 squared (211813179202) is 448648228828113126400
- 21181317920 cubed (211813179203) is 9502960769053173164003545088000
-
The
square root of 21181317920 is 145538.0291195397 -
The
cube root of 21181317920 is 2766.8417879829
Scales and comparisons
How big is 21181317920?- 21,181,317,920 seconds is equal to 673 years, 26 weeks, 3 hours, 25 minutes, 20 seconds.
-
To count from 1 to 21,181,317,920 would take you about one thousand, three hundred forty-seven 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 21181317920 cubic inches would be around 230.6 feet tall.
Recreational maths with 21181317920
- 21181317920 backwards is 02971318112
- 21181317920 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21181317920's digits is 35
- More coming soon!
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The information we have on file for 21181317920 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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