20056256 has 56 divisors (see below), whose sum is σ = 44866560. Its totient is φ = 8812800.

The previous prime is 20056247. The next prime is 20056259. The reversal of 20056256 is 65265002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20056259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21365 + ... + 22283.

Almost surely, 2^20056256 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 20056256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22433280).

20056256 is an abundant number, since it is smaller than the sum of its proper divisors (24810304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20056256 is a wasteful number, since it uses less digits than its factorization.

20056256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20056256 is about 4478.4211503609. The cubic root of 20056256 is about 271.6960272047.

The spelling of 20056256 in words is "twenty million, fifty-six thousand, two hundred fifty-six".