20260856 has 64 divisors (see below), whose sum is σ = 48936960. Its totient is φ = 7632000.

The previous prime is 20260837. The next prime is 20260873. The reversal of 20260856 is 65806202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18566 + ... + 19626.

It is an arithmetic number, because the mean of its divisors is an integer number (764640).

Almost surely, 2^20260856 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 20260856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24468480).

20260856 is an abundant number, since it is smaller than the sum of its proper divisors (28676104).

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

20260856 is a wasteful number, since it uses less digits than its factorization.

20260856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20260856 is about 4501.2060606020. The cubic root of 20260856 is about 272.6167880287.

The spelling of 20260856 in words is "twenty million, two hundred sixty thousand, eight hundred fifty-six".