21342720
21,342,720 is an even composite number composed of five prime numbers multiplied together.
21342720 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty divisors.
Prime factorization of 21342720:
29 × 3 × 5 × 7 × 397
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 7 × 397)See below for interesting mathematical facts about the number 21342720 from the Numbermatics database.
Names of 21342720
- Cardinal: 21342720 can be written as Twenty-one million, three hundred forty-two thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.134272 × 107
Factors of 21342720
Divisors of 21342720
- Number of divisors d(n): 160
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Complete list of divisors:
1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 64 70 80 84 96 105 112 120 128 140 160 168 192 210 224 240 256 280 320 336 384 397 420 448 480 512 560 640 672 768 794 840 896 960 1120 1191 1280 1344 1536 1588 1680 1792 1920 1985 2240 2382 2560 2688 2779 3176 3360 3584 3840 3970 4480 4764 5376 5558 5955 6352 6720 7680 7940 8337 8960 9528 10752 11116 11910 12704 13440 13895 15880 16674 17920 19056 22232 23820 25408 26880 27790 31760 33348 38112 41685 44464 47640 50816 53760 55580 63520 66696 76224 83370 88928 95280 101632 111160 127040 133392 152448 166740 177856 190560 203264 222320 254080 266784 304896 333480 355712 381120 444640 508160 533568 609792 666960 711424 762240 889280 1016320 1067136 1333920 1422848 1524480 1778560 2134272 2667840 3048960 3557120 4268544 5335680 7114240 10671360 21342720
- Sum of all divisors σ(n): 78173568
- Sum of proper divisors (its aliquot sum) s(n): 56830848
- 21342720 is an abundant number, because the sum of its proper divisors (56830848) is greater than itself. Its abundance is 35488128
Bases of 21342720
- Binary: 10100010110101010000000002
- Hexadecimal: 0x145AA00
- Base-36: CPG5C
Squares and roots of 21342720
- 21342720 squared (213427202) is 455511696998400
- 21342720 cubed (213427203) is 9721858605761691648000
-
The
square root of 21342720 is 4619.8181782403 -
The
cube root of 21342720 is 277.3851809703
Scales and comparisons
How big is 21342720?- 21,342,720 seconds is equal to 35 weeks, 2 days, 32 minutes.
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To count from 1 to 21,342,720 would take you about six days!
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 21342720 cubic inches would be around 23.1 feet tall.
Recreational maths with 21342720
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