# 21001731479

## 21,001,731,479 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21001731479 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 16 divisors.

21001731479 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of sixteen divisors.

## Prime factorization of 21001731479:

### 313 × 893

(31 × 31 × 31 × 89 × 89 × 89)

See below for interesting mathematical facts about the number 21001731479 from the Numbermatics database.

### Names of 21001731479

• Cardinal: 21001731479 can be written as Twenty-one billion, one million, seven hundred thirty-one thousand, four hundred seventy-nine.

### Scientific notation

• Scientific notation: 2.1001731479 × 1010

### Factors of 21001731479

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 120

### Divisors of 21001731479

• Number of divisors d(n): 16
• Complete list of divisors:
• Sum of all divisors σ(n): 21948376320
• Sum of proper divisors (its aliquot sum) s(n): 946644841
• 21001731479 is a deficient number, because the sum of its proper divisors (946644841) is less than itself. Its deficiency is 20055086638

### Bases of 21001731479

• Binary: 100111000111100110011111101100101112
• Base-36: 9NBVZPZ

### Squares and roots of 21001731479

• 21001731479 squared (210017314792) is 441072725116019527441
• 21001731479 cubed (210017314793) is 9263290935597421236636354015239
• The square root of 21001731479 is 144919.7415088779
• 21001731479 is a perfect cube number. Its cube root is 2759

### Scales and comparisons

How big is 21001731479?
• 21,001,731,479 seconds is equal to 667 years, 41 weeks, 14 hours, 17 minutes, 59 seconds.
• To count from 1 to 21,001,731,479 would take you about one thousand, three hundred thirty-five years!

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 21001731479 cubic inches would be around 229.9 feet tall.

### Recreational maths with 21001731479

• 21001731479 backwards is 97413710012
• The number of decimal digits it has is: 11
• The sum of 21001731479's digits is 35
• More coming soon!