21138941720
21,138,941,720 is an even composite number composed of seven prime numbers multiplied together.
What does the number 21138941720 look like?
This visualization shows the relationship between its 7 prime factors (large circles) and 256 divisors.
21138941720 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 21138941720:
23 × 5 × 13 × 17 × 19 × 127 × 991
(2 × 2 × 2 × 5 × 13 × 17 × 19 × 127 × 991)See below for interesting mathematical facts about the number 21138941720 from the Numbermatics database.
Names of 21138941720
- Cardinal: 21138941720 can be written as Twenty-one billion, one hundred thirty-eight million, nine hundred forty-one thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.113894172 × 1010
Factors of 21138941720
Divisors of 21138941720
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 4 5 8 10 13 17 19 20 26 34 38 40 52 65 68 76 85 95 104 127 130 136 152 170 190 221 247 254 260 323 340 380 442 494 508 520 635 646 680 760 884 988 991 1016 1105 1235 1270 1292 1615 1651 1768 1976 1982 2159 2210 2413 2470 2540 2584 3230 3302 3964 4199 4318 4420 4826 4940 4955 5080 6460 6604 7928 8255 8398 8636 8840 9652 9880 9910 10795 12065 12883 12920 13208 16510 16796 16847 17272 18829 19304 19820 20995 21590 24130 25766 28067 31369 33020 33592 33694 37658 39640 41021 41990 43180 48260 51532 56134 62738 64415 66040 67388 75316 82042 83980 84235 86360 94145 96520 103064 112268 125476 125857 128830 134776 140335 150632 156845 164084 167960 168470 188290 205105 219011 224536 244777 250952 251714 257660 280670 313690 320093 328168 336940 376580 410210 438022 489554 503428 515320 533273 561340 627380 629285 640186 673880 753160 820420 876044 979108 1006856 1066546 1095055 1122680 1223885 1254760 1258570 1280372 1600465 1636141 1640840 1752088 1958216 2133092 2139569 2190110 2391283 2447770 2517140 2560744 2666365 3200930 3272282 4161209 4266184 4279138 4380220 4782566 4895540 5034280 5332730 6401860 6544564 8180705 8322418 8558276 8760440 9565132 9791080 10665460 10697845 11956415 12803720 13089128 16361410 16644836 17116552 19130264 20806045 21330920 21395690 23912830 27814397 31086679 32722820 33289672 40651811 41612090 42791380 47825660 55628794 62173358 65445640 81303622 83224180 85582760 95651320 111257588 124346716 139071985 155433395 162607244 166448360 203259055 222515176 248693432 278143970 310866790 325214488 406518110 528473543 556287940 621733580 813036220 1056947086 1112575880 1243467160 1626072440 2113894172 2642367715 4227788344 5284735430 10569470860 21138941720
- Sum of all divisors σ(n): 57596313600
- Sum of proper divisors (its aliquot sum) s(n): 36457371880
- 21138941720 is an abundant number, because the sum of its proper divisors (36457371880) is greater than itself. Its abundance is 15318430160
Bases of 21138941720
- Binary: 100111010111111101010100111000110002
- Hexadecimal: 0x4EBFAA718
- Base-36: 9PLKVTK
Squares and roots of 21138941720
- 21138941720 squared (211389417202) is 446854857041556558400
- 21138941720 cubed (211389417203) is 9446038780300395706101376448000
-
The
square root of 21138941720 is 145392.3716018141 -
The
cube root of 21138941720 is 2764.9954043133
Scales and comparisons
How big is 21138941720?- 21,138,941,720 seconds is equal to 672 years, 7 weeks, 6 days, 16 hours, 15 minutes, 20 seconds.
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To count from 1 to 21,138,941,720 would take you about one thousand, three hundred forty-four 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 21138941720 cubic inches would be around 230.4 feet tall.
Recreational maths with 21138941720
- 21138941720 backwards is 02714983112
- 21138941720 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21138941720's digits is 38
- More coming soon!
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