21387771720
21,387,771,720 is an even composite number composed of seven prime numbers multiplied together.
What does the number 21387771720 look like?
This visualization shows the relationship between its 7 prime factors (large circles) and 384 divisors.
21387771720 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 21387771720:
23 × 32 × 5 × 7 × 31 × 43 × 6367
(2 × 2 × 2 × 3 × 3 × 5 × 7 × 31 × 43 × 6367)See below for interesting mathematical facts about the number 21387771720 from the Numbermatics database.
Names of 21387771720
- Cardinal: 21387771720 can be written as Twenty-one billion, three hundred eighty-seven million, seven hundred seventy-one thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.138777172 × 1010
Factors of 21387771720
Divisors of 21387771720
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 31 35 36 40 42 43 45 56 60 62 63 70 72 84 86 90 93 105 120 124 126 129 140 155 168 172 180 186 210 215 217 248 252 258 279 280 301 310 315 344 360 372 387 420 430 434 465 504 516 558 602 620 630 645 651 744 774 840 860 868 903 930 1032 1085 1116 1204 1240 1260 1290 1302 1333 1395 1505 1548 1720 1736 1806 1860 1935 1953 2170 2232 2408 2520 2580 2604 2666 2709 2790 3010 3096 3255 3612 3720 3870 3906 3999 4340 4515 5160 5208 5332 5418 5580 6020 6367 6510 6665 7224 7740 7812 7998 8680 9030 9331 9765 10664 10836 11160 11997 12040 12734 13020 13330 13545 15480 15624 15996 18060 18662 19101 19530 19995 21672 23994 25468 26040 26660 27090 27993 31835 31992 36120 37324 38202 39060 39990 44569 46655 47988 50936 53320 54180 55986 57303 59985 63670 74648 76404 78120 79980 83979 89138 93310 95505 95976 108360 111972 114606 119970 127340 133707 139965 152808 159960 167958 178276 186620 191010 197377 222845 223944 229212 239940 254680 267414 273781 279930 286515 335916 356552 373240 382020 394754 401121 419895 445690 458424 479880 534828 547562 559860 573030 592131 668535 671832 764040 789508 802242 821343 839790 891380 986885 1069656 1095124 1119720 1146060 1184262 1337070 1368905 1381639 1579016 1604484 1642686 1679580 1776393 1782760 1916467 1973770 2005605 2190248 2292120 2368524 2464029 2674140 2737810 2763278 2960655 3208968 3285372 3359160 3552786 3832934 3947540 4011210 4106715 4144917 4737048 4928058 5348280 5475620 5526556 5749401 5921310 6570744 6908195 7105572 7665868 7895080 8022420 8213430 8289834 8487211 8881965 9582335 9856116 10951240 11053112 11498802 11842620 12320145 12434751 13816390 14211144 15331736 16044840 16426860 16579668 16974422 17248203 17763930 19164670 19712232 20724585 22997604 23685240 24640290 24869502 25461633 27632780 28747005 32853720 33159336 33948844 34496406 35527860 38329340 41449170 42436055 45995208 49280580 49739004 50923266 55265560 57494010 59410477 62173755 67897688 68992812 71055720 76384899 76658680 82898340 84872110 86241015 98561160 99478008 101846532 114988020 118820954 124347510 127308165 137985624 152769798 165796680 169744220 172482030 178231431 203693064 229976040 237641908 248695020 254616330 297052385 305539596 339488440 344964060 356462862 381924495 475283816 497390040 509232660 534694293 594104770 611079192 689928120 712925724 763848990 891157155 1018465320 1069388586 1188209540 1425851448 1527697980 1782314310 2138777172 2376419080 2673471465 3055395960 3564628620 4277554344 5346942930 7129257240 10693885860 21387771720
- Sum of all divisors σ(n): 83923107840
- Sum of proper divisors (its aliquot sum) s(n): 62535336120
- 21387771720 is an abundant number, because the sum of its proper divisors (62535336120) is greater than itself. Its abundance is 41147564400
Bases of 21387771720
- Binary: 100111110101100111101111111010010002
- Hexadecimal: 0x4FACF7F48
- Base-36: 9TPQ6A0
Squares and roots of 21387771720
- 21387771720 squared (213877717202) is 457436779146831758400
- 21387771720 cubed (213877717203) is 9783553408724494009905392448000
-
The
square root of 21387771720 is 146245.5870103437 -
The
cube root of 21387771720 is 2775.8021854215
Scales and comparisons
How big is 21387771720?- 21,387,771,720 seconds is equal to 680 years, 3 weeks, 2 days, 15 hours, 42 minutes.
-
To count from 1 to 21,387,771,720 would take you about one thousand, three hundred sixty 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 21387771720 cubic inches would be around 231.3 feet tall.
Recreational maths with 21387771720
- 21387771720 backwards is 02717778312
- 21387771720 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21387771720's digits is 45
- More coming soon!
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The information we have on file for 21387771720 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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