21138897920
21,138,897,920 is an even composite number composed of four prime numbers multiplied together.
21138897920 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of one hundred seventy-six divisors.
Prime factorization of 21138897920:
210 × 5 × 73 × 12037
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 7 × 7 × 7 × 12037)See below for interesting mathematical facts about the number 21138897920 from the Numbermatics database.
Names of 21138897920
- Cardinal: 21138897920 can be written as Twenty-one billion, one hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.113889792 × 1010
Factors of 21138897920
Divisors of 21138897920
- Number of divisors d(n): 176
-
Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 32 35 40 49 56 64 70 80 98 112 128 140 160 196 224 245 256 280 320 343 392 448 490 512 560 640 686 784 896 980 1024 1120 1280 1372 1568 1715 1792 1960 2240 2560 2744 3136 3430 3584 3920 4480 5120 5488 6272 6860 7168 7840 8960 10976 12037 12544 13720 15680 17920 21952 24074 25088 27440 31360 35840 43904 48148 50176 54880 60185 62720 84259 87808 96296 109760 120370 125440 168518 175616 192592 219520 240740 250880 337036 351232 385184 421295 439040 481480 589813 674072 770368 842590 878080 962960 1179626 1348144 1540736 1685180 1756160 1925920 2359252 2696288 2949065 3081472 3370360 3851840 4128691 4718504 5392576 5898130 6162944 6740720 7703680 8257382 9437008 10785152 11796260 12325888 13481440 15407360 16514764 18874016 20643455 21570304 23592520 26962880 30814720 33029528 37748032 41286910 43140608 47185040 53925760 61629440 66059056 75496064 82573820 86281216 94370080 107851520 132118112 150992128 165147640 188740160 215703040 264236224 301984256 330295280 377480320 431406080 528472448 603968512 660590560 754960640 1056944896 1321181120 1509921280 2113889792 2642362240 3019842560 4227779584 5284724480 10569448960 21138897920
- Sum of all divisors σ(n): 59140286400
- Sum of proper divisors (its aliquot sum) s(n): 38001388480
- 21138897920 is an abundant number, because the sum of its proper divisors (38001388480) is greater than itself. Its abundance is 16862490560
Bases of 21138897920
- Binary: 100111010111111100111111100000000002
- Hexadecimal: 0x4EBF9FC00
- Base-36: 9PLJY0W
Squares and roots of 21138897920
- 21138897920 squared (211388979202) is 446853005272180326400
- 21138897920 cubed (211388979203) is 9445980063693841735601881088000
-
The
square root of 21138897920 is 145392.2209748513 -
The
cube root of 21138897920 is 2764.9934946169
Scales and comparisons
How big is 21138897920?- 21,138,897,920 seconds is equal to 672 years, 7 weeks, 6 days, 4 hours, 5 minutes, 20 seconds.
-
To count from 1 to 21,138,897,920 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 21138897920 cubic inches would be around 230.4 feet tall.
Recreational maths with 21138897920
- 21138897920 backwards is 02979883112
- The number of decimal digits it has is: 11
- The sum of 21138897920's digits is 50
- More coming soon!
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