21020
21,020 is an even composite number composed of three prime numbers multiplied together.
21020 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.
Prime factorization of 21020:
22 × 5 × 1051
(2 × 2 × 5 × 1051)See below for interesting mathematical facts about the number 21020 from the Numbermatics database.
Names of 21020
- Cardinal: 21020 can be written as Twenty-one thousand and twenty.
Scientific notation
- Scientific notation: 2.102 × 104
Factors of 21020
Divisors of 21020
Bases of 21020
- Binary: 1010010000111002
- Hexadecimal: 0x521C
- Base-36: G7W
Squares and roots of 21020
- 21020 squared (210202) is 441840400
- 21020 cubed (210203) is 9287485208000
-
The
square root of 21020 is 144.9827575955 -
The
cube root of 21020 is 27.5979974743
Scales and comparisons
How big is 21020?- 21,020 seconds is equal to 5 hours, 50 minutes, 20 seconds.
-
To count from 1 to 21,020 would take you about five 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 21020 cubic inches would be around 2.3 feet tall.
Recreational maths with 21020
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