20856696 has 32 divisors (see below), whose sum is σ = 59591040. Its totient is φ = 5959008.

The previous prime is 20856679. The next prime is 20856709. The reversal of 20856696 is 69665802.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 61906 + ... + 62241.

It is an arithmetic number, because the mean of its divisors is an integer number (1862220).

Almost surely, 2^20856696 is an apocalyptic number.

It is an amenable number.

20856696 is an abundant number, since it is smaller than the sum of its proper divisors (38734344).

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

20856696 is a wasteful number, since it uses less digits than its factorization.

20856696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124163 (or 124159 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 20856696 is about 4566.9131806944. The cubic root of 20856696 is about 275.2634214183.

The spelling of 20856696 in words is "twenty million, eight hundred fifty-six thousand, six hundred ninety-six".