# 21842

## 21,842 is an even composite number composed of three prime numbers multiplied together.

What does the number 21842 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

21842 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 21842:

### 2 × 67 × 163

See below for interesting mathematical facts about the number 21842 from the Numbermatics database.

### Names of 21842

• Cardinal: 21842 can be written as Twenty-one thousand, eight hundred forty-two.

### Scientific notation

• Scientific notation: 2.1842 × 104

### Factors of 21842

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 232

### Divisors of 21842

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 33456
• Sum of proper divisors (its aliquot sum) s(n): 11614
• 21842 is a deficient number, because the sum of its proper divisors (11614) is less than itself. Its deficiency is 10228

### Bases of 21842

• Binary: 1010101010100102
• Base-36: GUQ

### Squares and roots of 21842

• 21842 squared (218422) is 477072964
• 21842 cubed (218423) is 10420227679688
• The square root of 21842 is 147.7903921099
• The cube root of 21842 is 27.9531529561

### Scales and comparisons

How big is 21842?
• 21,842 seconds is equal to 6 hours, 4 minutes, 2 seconds.
• To count from 1 to 21,842 would take you about six 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 21842 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21842

• 21842 backwards is 24812
• The number of decimal digits it has is: 5
• The sum of 21842's digits is 17
• More coming soon!

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The information we have on file for 21842 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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