21399720
21,399,720 is an even composite number composed of five prime numbers multiplied together.
21399720 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21399720:
23 × 3 × 5 × 151 × 1181
(2 × 2 × 2 × 3 × 5 × 151 × 1181)See below for interesting mathematical facts about the number 21399720 from the Numbermatics database.
Names of 21399720
- Cardinal: 21399720 can be written as Twenty-one million, three hundred ninety-nine thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.139972 × 107
Factors of 21399720
Divisors of 21399720
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 151 302 453 604 755 906 1181 1208 1510 1812 2265 2362 3020 3543 3624 4530 4724 5905 6040 7086 9060 9448 11810 14172 17715 18120 23620 28344 35430 47240 70860 141720 178331 356662 534993 713324 891655 1069986 1426648 1783310 2139972 2674965 3566620 4279944 5349930 7133240 10699860 21399720
- Sum of all divisors σ(n): 64679040
- Sum of proper divisors (its aliquot sum) s(n): 43279320
- 21399720 is an abundant number, because the sum of its proper divisors (43279320) is greater than itself. Its abundance is 21879600
Bases of 21399720
- Binary: 10100011010001000101010002
- Hexadecimal: 0x14688A8
- Base-36: CQO4O
Squares and roots of 21399720
- 21399720 squared (213997202) is 457948016078400
- 21399720 cubed (213997203) is 9799959318633258048000
-
The
square root of 21399720 is 4625.9831387501 -
The
cube root of 21399720 is 277.6318989885
Scales and comparisons
How big is 21399720?- 21,399,720 seconds is equal to 35 weeks, 2 days, 16 hours, 22 minutes.
-
To count from 1 to 21,399,720 would take you about twelve hours!
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 21399720 cubic inches would be around 23.1 feet tall.
Recreational maths with 21399720
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 21399720 - Facts about the integer". Numbermatics.com. 2024. Web. 6 June 2024.
APA style:
Numbermatics. (2024). Number 21399720 - Facts about the integer. Retrieved 6 June 2024, from https://numbermatics.com/n/21399720/
Chicago style:
Numbermatics. 2024. "Number 21399720 - Facts about the integer". https://numbermatics.com/n/21399720/
The information we have on file for 21399720 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 21399720, math, Factors of 21399720, curriculum, school, college, exams, university, Prime factorization of 21399720, STEM, science, technology, engineering, physics, economics, calculator, twenty-one million, three hundred ninety-nine thousand, seven hundred twenty.