# 21770

## 21,770 is an even composite number composed of four prime numbers multiplied together.

What does the number 21770 look like?

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

21770 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixteen divisors.

## Prime factorization of 21770:

### 2 × 5 × 7 × 311

See below for interesting mathematical facts about the number 21770 from the Numbermatics database.

### Names of 21770

• Cardinal: 21770 can be written as Twenty-one thousand, seven hundred seventy.

### Scientific notation

• Scientific notation: 2.177 × 104

### Factors of 21770

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 325

### Divisors of 21770

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 44928
• Sum of proper divisors (its aliquot sum) s(n): 23158
• 21770 is an abundant number, because the sum of its proper divisors (23158) is greater than itself. Its abundance is 1388

### Bases of 21770

• Binary: 1010101000010102
• Base-36: GSQ

### Squares and roots of 21770

• 21770 squared (217702) is 473932900
• 21770 cubed (217703) is 10317519233000
• The square root of 21770 is 147.5466028073
• The cube root of 21770 is 27.9224042067

### Scales and comparisons

How big is 21770?
• 21,770 seconds is equal to 6 hours, 2 minutes, 50 seconds.
• To count from 1 to 21,770 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 21770 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21770

• 21770 backwards is 07712
• The number of decimal digits it has is: 5
• The sum of 21770's digits is 17
• More coming soon!