21213840
21,213,840 is an even composite number composed of five prime numbers multiplied together.
21213840 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 21213840:
24 × 3 × 5 × 157 × 563
(2 × 2 × 2 × 2 × 3 × 5 × 157 × 563)See below for interesting mathematical facts about the number 21213840 from the Numbermatics database.
Names of 21213840
- Cardinal: 21213840 can be written as Twenty-one million, two hundred thirteen thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.121384 × 107
Factors of 21213840
Divisors of 21213840
- 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 80 120 157 240 314 471 563 628 785 942 1126 1256 1570 1689 1884 2252 2355 2512 2815 3140 3378 3768 4504 4710 5630 6280 6756 7536 8445 9008 9420 11260 12560 13512 16890 18840 22520 27024 33780 37680 45040 67560 88391 135120 176782 265173 353564 441955 530346 707128 883910 1060692 1325865 1414256 1767820 2121384 2651730 3535640 4242768 5303460 7071280 10606920 21213840
- Sum of all divisors σ(n): 66299328
- Sum of proper divisors (its aliquot sum) s(n): 45085488
- 21213840 is an abundant number, because the sum of its proper divisors (45085488) is greater than itself. Its abundance is 23871648
Bases of 21213840
- Binary: 10100001110110010100100002
- Hexadecimal: 0x143B290
- Base-36: CMOPC
Squares and roots of 21213840
- 21213840 squared (212138402) is 450027007545600
- 21213840 cubed (212138403) is 9546800933751151104000
-
The
square root of 21213840 is 4605.8484560393 -
The
cube root of 21213840 is 276.8257145857
Scales and comparisons
How big is 21213840?- 21,213,840 seconds is equal to 35 weeks, 12 hours, 44 minutes.
-
To count from 1 to 21,213,840 would take you about four 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 21213840 cubic inches would be around 23.1 feet tall.
Recreational maths with 21213840
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 21213840 - Facts about the integer". Numbermatics.com. 2024. Web. 2 May 2024.
APA style:
Numbermatics. (2024). Number 21213840 - Facts about the integer. Retrieved 2 May 2024, from https://numbermatics.com/n/21213840/
Chicago style:
Numbermatics. 2024. "Number 21213840 - Facts about the integer". https://numbermatics.com/n/21213840/
The information we have on file for 21213840 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!
Keywords: Divisors of 21213840, math, Factors of 21213840, curriculum, school, college, exams, university, Prime factorization of 21213840, STEM, science, technology, engineering, physics, economics, calculator, twenty-one million, two hundred thirteen thousand, eight hundred forty.