20876256 has 72 divisors (see below), whose sum is σ = 59852520. Its totient is φ = 6902016.

The previous prime is 20876239. The next prime is 20876263. The reversal of 20876256 is 65267802.

20876256 is a `hidden beast` number, since 20 + 8 + 7 + 625 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20876256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49615 + ... + 50033.

It is an arithmetic number, because the mean of its divisors is an integer number (831285).

Almost surely, 2^20876256 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 20876256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29926260).

20876256 is an abundant number, since it is smaller than the sum of its proper divisors (38976264).

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

20876256 is a wasteful number, since it uses less digits than its factorization.

20876256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 20876256 is about 4569.0541690814. The cubic root of 20876256 is about 275.3494444755.

The spelling of 20876256 in words is "twenty million, eight hundred seventy-six thousand, two hundred fifty-six".