20865

20,865 is an odd composite number composed of four prime numbers multiplied together.

What does the number 20865 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 16 divisors.

20865 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

Prime factorization of 20865:

3 × 5 × 13 × 107

See below for interesting mathematical facts about the number 20865 from the Numbermatics database.


Names of 20865

  • Cardinal: 20865 can be written as Twenty thousand, eight hundred sixty-five.

Scientific notation

  • Scientific notation: 2.0865 × 104

Factors of 20865

  • Number of distinct prime factors ω(n): 4
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 128

Divisors of 20865

  • Number of divisors d(n): 16
  • Complete list of divisors:
  • Sum of all divisors σ(n): 36288
  • Sum of proper divisors (its aliquot sum) s(n): 15423
  • 20865 is a deficient number, because the sum of its proper divisors (15423) is less than itself. Its deficiency is 5442

Bases of 20865

  • Binary: 1010001100000012
  • Hexadecimal: 0x5181
  • Base-36: G3L

Squares and roots of 20865

  • 20865 squared (208652) is 435348225
  • 20865 cubed (208653) is 9083540714625
  • The square root of 20865 is 144.4472221957
  • The cube root of 20865 is 27.5299948203

Scales and comparisons

How big is 20865?
  • 20,865 seconds is equal to 5 hours, 47 minutes, 45 seconds.
  • To count from 1 to 20,865 would take you about five 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 20865 cubic inches would be around 2.3 feet tall.

Recreational maths with 20865

  • 20865 backwards is 56802
  • The number of decimal digits it has is: 5
  • The sum of 20865's digits is 21
  • More coming soon!

Copy this link to share with anyone:


Share this page on social media:

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 20865 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

APA style:
Numbermatics. (2024). Number 20865 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/20865/

Chicago style:
Numbermatics. 2024. "Number 20865 - Facts about the integer". https://numbermatics.com/n/20865/

The information we have on file for 20865 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 20865, math, Factors of 20865, curriculum, school, college, exams, university, Prime factorization of 20865, STEM, science, technology, engineering, physics, economics, calculator, twenty thousand, eight hundred sixty-five.

Oh no. Javascript is switched off in your browser.
Some bits of this website may not work unless you switch it on.