Base | Representation |
---|---|
bin | 101001111011… |
… | …0010110000000 |
3 | 1112100201122020 |
4 | 1103312112000 |
5 | 21111334134 |
6 | 2103041440 |
7 | 354555135 |
oct | 123662600 |
9 | 45321566 |
10 | 21980544 |
11 | 11453343 |
12 | 7440280 |
13 | 4727a51 |
14 | 2cc258c |
15 | 1de2b49 |
hex | 14f6580 |
21980544 has 32 divisors (see below), whose sum is σ = 58386840. Its totient is φ = 7326720.
The previous prime is 21980513. The next prime is 21980561. The reversal of 21980544 is 44508912.
It is a tau number, because it is divible by the number of its divisors (32).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28237 + ... + 29004.
Almost surely, 221980544 is an apocalyptic number.
21980544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
21980544 is an abundant number, since it is smaller than the sum of its proper divisors (36406296).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21980544 is an equidigital number, since it uses as much as digits as its factorization.
21980544 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 57258 (or 57246 counting only the distinct ones).
The product of its (nonzero) digits is 11520, while the sum is 33.
The square root of 21980544 is about 4688.3412845056. The cubic root of 21980544 is about 280.1213079808.
The spelling of 21980544 in words is "twenty-one million, nine hundred eighty thousand, five hundred forty-four".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.067 sec. • engine limits •