# 21021770

## 21,021,770 is an even composite number composed of six prime numbers multiplied together.

What does the number 21021770 look like?

This visualization shows the relationship between its 6 prime factors (large circles) and 64 divisors.

21021770 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.

## Prime factorization of 21021770:

### 2 × 5 × 7 × 11 × 23 × 1187

See below for interesting mathematical facts about the number 21021770 from the Numbermatics database.

### Names of 21021770

• Cardinal: 21021770 can be written as Twenty-one million, twenty-one thousand, seven hundred seventy.

### Scientific notation

• Scientific notation: 2.102177 × 107

### Factors of 21021770

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1235

### Divisors of 21021770

• Number of divisors d(n): 64
• Complete list of divisors:
• Sum of all divisors σ(n): 49268736
• Sum of proper divisors (its aliquot sum) s(n): 28246966
• 21021770 is an abundant number, because the sum of its proper divisors (28246966) is greater than itself. Its abundance is 7225196

### Bases of 21021770

• Binary: 10100000011000100010010102
• Base-36: CIKI2

### Squares and roots of 21021770

• 21021770 squared (210217702) is 441914813932900
• 21021770 cubed (210217703) is 9289831578090219233000
• The square root of 21021770 is 4584.9503814109
• The cube root of 21021770 is 275.9877208707

### Scales and comparisons

How big is 21021770?
• 21,021,770 seconds is equal to 34 weeks, 5 days, 7 hours, 22 minutes, 50 seconds.
• To count from 1 to 21,021,770 would take you about twenty-three 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 21021770 cubic inches would be around 23 feet tall.

### Recreational maths with 21021770

• 21021770 backwards is 07712012
• The number of decimal digits it has is: 8
• The sum of 21021770's digits is 20
• More coming soon!