# 21769

## 21,769 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21769 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

21769 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 21769:

### 11 × 1979

See below for interesting mathematical facts about the number 21769 from the Numbermatics database.

### Names of 21769

• Cardinal: 21769 can be written as Twenty-one thousand, seven hundred sixty-nine.

### Scientific notation

• Scientific notation: 2.1769 × 104

### Factors of 21769

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1990

### Divisors of 21769

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 23760
• Sum of proper divisors (its aliquot sum) s(n): 1991
• 21769 is a deficient number, because the sum of its proper divisors (1991) is less than itself. Its deficiency is 19778

### Bases of 21769

• Binary: 1010101000010012
• Base-36: GSP

### Squares and roots of 21769

• 21769 squared (217692) is 473889361
• 21769 cubed (217693) is 10316097499609
• The square root of 21769 is 147.5432140085
• The cube root of 21769 is 27.9219766637

### Scales and comparisons

How big is 21769?
• 21,769 seconds is equal to 6 hours, 2 minutes, 49 seconds.
• To count from 1 to 21,769 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 21769 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21769

• 21769 backwards is 96712
• The number of decimal digits it has is: 5
• The sum of 21769's digits is 25
• More coming soon!