Base | Representation |
---|---|
bin | 101000111100… |
… | …1011110000000 |
3 | 1111101202000020 |
4 | 1101321132000 |
5 | 20444002211 |
6 | 2044053440 |
7 | 350325000 |
oct | 121713600 |
9 | 44352006 |
10 | 21469056 |
11 | 11134024 |
12 | 7234280 |
13 | 45a8cab |
14 | 2bcc000 |
15 | 1d41306 |
hex | 1479780 |
21469056 has 128 divisors (see below), whose sum is σ = 66912000. Its totient is φ = 6096384.
The previous prime is 21469033. The next prime is 21469057. The reversal of 21469056 is 65096412.
It is a tau number, because it is divible by the number of its divisors (128).
It is a super-2 number, since 2×214690562 = 921840731062272, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21469057) by changing a digit.
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 15 ways as a sum of consecutive naturals, for example, 131631 + ... + 131793.
It is an arithmetic number, because the mean of its divisors is an integer number (522750).
Almost surely, 221469056 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21469056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33456000).
21469056 is an abundant number, since it is smaller than the sum of its proper divisors (45442944).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21469056 is an equidigital number, since it uses as much as digits as its factorization.
21469056 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 201 (or 175 counting only the distinct ones).
The product of its (nonzero) digits is 12960, while the sum is 33.
The square root of 21469056 is about 4633.4712689300. The cubic root of 21469056 is about 277.9314221058.
The spelling of 21469056 in words is "twenty-one million, four hundred sixty-nine thousand, fifty-six".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.062 sec. • engine limits •