20556032 has 36 divisors (see below), whose sum is σ = 46897536. Its totient is φ = 8808960.

The previous prime is 20556031. The next prime is 20556049. The reversal of 20556032 is 23065502.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20555989 and 20556007.

It is not an unprimeable number, because it can be changed into a prime (20556031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3944 + ... + 7527.

Almost surely, 2^20556032 is an apocalyptic number.

It is an amenable number.

20556032 is an abundant number, since it is smaller than the sum of its proper divisors (26341504).

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

20556032 is an equidigital number, since it uses as much as digits as its factorization.

20556032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494 (or 11480 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20556032 is about 4533.8760459457. The cubic root of 20556032 is about 273.9343085809.

The spelling of 20556032 in words is "twenty million, five hundred fifty-six thousand, thirty-two".