20788856 has 32 divisors (see below), whose sum is σ = 42709680. Its totient is φ = 9408000.

The previous prime is 20788847. The next prime is 20788877. The reversal of 20788856 is 65888702.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29306 + ... + 30006.

Almost surely, 2^20788856 is an apocalyptic number.

It is an amenable number.

20788856 is an abundant number, since it is smaller than the sum of its proper divisors (21920824).

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

20788856 is a wasteful number, since it uses less digits than its factorization.

20788856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 20788856 is about 4559.4797948889. The cubic root of 20788856 is about 274.9646500016.

The spelling of 20788856 in words is "twenty million, seven hundred eighty-eight thousand, eight hundred fifty-six".