# 21366

## 21,366 is an even composite number composed of three prime numbers multiplied together.

What does the number 21366 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21366 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

## Prime factorization of 21366:

### 2 × 32 × 1187

(2 × 3 × 3 × 1187)

See below for interesting mathematical facts about the number 21366 from the Numbermatics database.

### Names of 21366

• Cardinal: 21366 can be written as Twenty-one thousand, three hundred sixty-six.

### Scientific notation

• Scientific notation: 2.1366 × 104

### Factors of 21366

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 1192

### Divisors of 21366

• Number of divisors d(n): 12
• Complete list of divisors:
• Sum of all divisors σ(n): 46332
• Sum of proper divisors (its aliquot sum) s(n): 24966
• 21366 is an abundant number, because the sum of its proper divisors (24966) is greater than itself. Its abundance is 3600

### Bases of 21366

• Binary: 1010011011101102
• Base-36: GHI

### Squares and roots of 21366

• 21366 squared (213662) is 456505956
• 21366 cubed (213663) is 9753706255896
• The square root of 21366 is 146.1711325809
• The cube root of 21366 is 27.7485998807

### Scales and comparisons

How big is 21366?
• 21,366 seconds is equal to 5 hours, 56 minutes, 6 seconds.
• To count from 1 to 21,366 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 21366 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21366

• 21366 backwards is 66312
• 21366 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21366's digits is 18
• More coming soon!