# 21000169

## 21,000,169 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 21000169 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

21000169 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 21000169:

### 21000169

See below for interesting mathematical facts about the number 21000169 from the Numbermatics database.

### Names of 21000169

• Cardinal: 21000169 can be written as Twenty-one million, one hundred sixty-nine.

### Scientific notation

• Scientific notation: 2.1000169 × 107

### Factors of 21000169

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21000169

### Divisors of 21000169

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 21000170
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21000169 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21000168

### Bases of 21000169

• Binary: 10100000001101111111010012
• Base-36: CI3U1

### Squares and roots of 21000169

• 21000169 squared (210001692) is 441007098028561
• 21000169 cubed (210001693) is 9261223588799347826809
• The square root of 21000169 is 4582.5941343305
• The cube root of 21000169 is 275.8931577285

### Scales and comparisons

How big is 21000169?
• 21,000,169 seconds is equal to 34 weeks, 5 days, 1 hour, 22 minutes, 49 seconds.
• To count from 1 to 21,000,169 would take you about fourteen 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 21000169 cubic inches would be around 23 feet tall.

### Recreational maths with 21000169

• 21000169 backwards is 96100012
• The number of decimal digits it has is: 8
• The sum of 21000169's digits is 19
• More coming soon!