21185040
21,185,040 is an even composite number composed of five prime numbers multiplied together.
21185040 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21185040:
24 × 3 × 5 × 103 × 857
(2 × 2 × 2 × 2 × 3 × 5 × 103 × 857)See below for interesting mathematical facts about the number 21185040 from the Numbermatics database.
Names of 21185040
- Cardinal: 21185040 can be written as Twenty-one million, one hundred eighty-five thousand and forty.
Scientific notation
- Scientific notation: 2.118504 × 107
Factors of 21185040
Divisors of 21185040
- Number of divisors d(n): 80
-
Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 103 120 206 240 309 412 515 618 824 857 1030 1236 1545 1648 1714 2060 2472 2571 3090 3428 4120 4285 4944 5142 6180 6856 8240 8570 10284 12360 12855 13712 17140 20568 24720 25710 34280 41136 51420 68560 88271 102840 176542 205680 264813 353084 441355 529626 706168 882710 1059252 1324065 1412336 1765420 2118504 2648130 3530840 4237008 5296260 7061680 10592520 21185040
- Sum of all divisors σ(n): 66388608
- Sum of proper divisors (its aliquot sum) s(n): 45203568
- 21185040 is an abundant number, because the sum of its proper divisors (45203568) is greater than itself. Its abundance is 24018528
Bases of 21185040
- Binary: 10100001101000010000100002
- Hexadecimal: 0x1434210
- Base-36: CM2HC
Squares and roots of 21185040
- 21185040 squared (211850402) is 448805919801600
- 21185040 cubed (211850403) is 9507971363233688064000
-
The
square root of 21185040 is 4602.7209344041 -
The
cube root of 21185040 is 276.7003845939
Scales and comparisons
How big is 21185040?- 21,185,040 seconds is equal to 35 weeks, 4 hours, 44 minutes.
-
To count from 1 to 21,185,040 would take you about three 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 21185040 cubic inches would be around 23.1 feet tall.
Recreational maths with 21185040
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The information we have on file for 21185040 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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