20412656 has 20 divisors (see below), whose sum is σ = 43145304. Its totient is φ = 9278400.

The previous prime is 20412649. The next prime is 20412671. The reversal of 20412656 is 65621402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57815 + ... + 58166.

Almost surely, 2^20412656 is an apocalyptic number.

It is an amenable number.

20412656 is an abundant number, since it is smaller than the sum of its proper divisors (22732648).

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

20412656 is a wasteful number, since it uses less digits than its factorization.

20412656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116000 (or 115994 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20412656 is about 4518.0367417718. The cubic root of 20412656 is about 273.2959351305.

The spelling of 20412656 in words is "twenty million, four hundred twelve thousand, six hundred fifty-six".