# 21168

## 21,168 is an even composite number composed of three prime numbers multiplied together.

What does the number 21168 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 60 divisors.

21168 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of sixty divisors.

## Prime factorization of 21168:

### 24 × 33 × 72

(2 × 2 × 2 × 2 × 3 × 3 × 3 × 7 × 7)

See below for interesting mathematical facts about the number 21168 from the Numbermatics database.

### Names of 21168

• Cardinal: 21168 can be written as Twenty-one thousand, one hundred sixty-eight.

### Scientific notation

• Scientific notation: 2.1168 × 104

### Factors of 21168

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 12

### Divisors of 21168

• Number of divisors d(n): 60
• Complete list of divisors:
• Sum of all divisors σ(n): 70680
• Sum of proper divisors (its aliquot sum) s(n): 49512
• 21168 is an abundant number, because the sum of its proper divisors (49512) is greater than itself. Its abundance is 28344

### Bases of 21168

• Binary: 1010010101100002
• Base-36: GC0

### Squares and roots of 21168

• 21168 squared (211682) is 448084224
• 21168 cubed (211683) is 9485046853632
• The square root of 21168 is 145.4922678357
• The cube root of 21168 is 27.6626177523

### Scales and comparisons

How big is 21168?
• 21,168 seconds is equal to 5 hours, 52 minutes, 48 seconds.
• To count from 1 to 21,168 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 21168 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21168

• 21168 backwards is 86112
• 21168 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21168's digits is 18
• More coming soon!