| Base | Representation |
|---|---|
| bin | 10011100101101010… |
| … | …100110101110100000 |
| 3 | 2000021211100010201121 |
| 4 | 103211222212232200 |
| 5 | 321033423122240 |
| 6 | 13355030342024 |
| 7 | 1343134502644 |
| oct | 234552465640 |
| 9 | 60254303647 |
| 10 | 21033020320 |
| 11 | 8a13656524 |
| 12 | 40ababa914 |
| 13 | 1ca2706770 |
| 14 | 103758ac24 |
| 15 | 8317c104a |
| hex | 4e5aa6ba0 |
21033020320 has 96 divisors (see below), whose sum is σ = 54522819792. Its totient is φ = 7619469312.
The previous prime is 21033020303. The next prime is 21033020321. The reversal of 21033020320 is 2302033012.
It can be written as a sum of positive squares in 8 ways, for example, as 11118437136 + 9914583184 = 105444^2 + 99572^2 .
It is a super-3 number, since 3×210330203203 (a number of 32 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (16).
It is a junction number, because it is equal to n+sod(n) for n = 21033020294 and 21033020303.
It is not an unprimeable number, because it can be changed into a prime (21033020321) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14844 + ... + 205636.
Almost surely, 221033020320 is an apocalyptic number.
21033020320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21033020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27261409896).
21033020320 is an abundant number, since it is smaller than the sum of its proper divisors (33489799472).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21033020320 is a wasteful number, since it uses less digits than its factorization.
21033020320 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 190874 (or 190866 counting only the distinct ones).
The product of its (nonzero) digits is 216, while the sum is 16.
Adding to 21033020320 its reverse (2302033012), we get a palindrome (23335053332).
The spelling of 21033020320 in words is "twenty-one billion, thirty-three million, twenty thousand, three hundred twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.063 sec. • engine limits •