21680000
21,680,000 is an even composite number composed of three prime numbers multiplied together.
21680000 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21680000:
27 × 54 × 271
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5 × 5 × 271)See below for interesting mathematical facts about the number 21680000 from the Numbermatics database.
Names of 21680000
- Cardinal: 21680000 can be written as Twenty-one million, six hundred eighty thousand.
Scientific notation
- Scientific notation: 2.168 × 107
Factors of 21680000
Divisors of 21680000
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 271 320 400 500 542 625 640 800 1000 1084 1250 1355 1600 2000 2168 2500 2710 3200 4000 4336 5000 5420 6775 8000 8672 10000 10840 13550 16000 17344 20000 21680 27100 33875 34688 40000 43360 54200 67750 80000 86720 108400 135500 169375 173440 216800 271000 338750 433600 542000 677500 867200 1084000 1355000 2168000 2710000 4336000 5420000 10840000 21680000
- Sum of all divisors σ(n): 54170160
- Sum of proper divisors (its aliquot sum) s(n): 32490160
- 21680000 is an abundant number, because the sum of its proper divisors (32490160) is greater than itself. Its abundance is 10810160
Bases of 21680000
- Binary: 10100101011001111100000002
- Hexadecimal: 0x14ACF80
- Base-36: CWOE8
Squares and roots of 21680000
- 21680000 squared (216800002) is 470022400000000
- 21680000 cubed (216800003) is 10190085632000000000000
-
The
square root of 21680000 is 4656.1786907291 -
The
cube root of 21680000 is 278.8387278123
Scales and comparisons
How big is 21680000?- 21,680,000 seconds is equal to 35 weeks, 5 days, 22 hours, 13 minutes, 20 seconds.
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To count from 1 to 21,680,000 would take you about five 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 21680000 cubic inches would be around 23.2 feet tall.
Recreational maths with 21680000
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