20556078873 has 32 divisors (see below), whose sum is σ = 30019507200. Its totient is φ = 12408452160.

The previous prime is 20556078847. The next prime is 20556078901. The reversal of 20556078873 is 37887065502.

It is not a de Polignac number, because 20556078873 - 2⁵ = 20556078841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20556078373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11009286 + ... + 11011152.

It is an arithmetic number, because the mean of its divisors is an integer number (938109600).

Almost surely, 2^20556078873 is an apocalyptic number.

It is an amenable number.

20556078873 is a deficient number, since it is larger than the sum of its proper divisors (9463428327).

20556078873 is a wasteful number, since it uses less digits than its factorization.

20556078873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 20556078873 in words is "twenty billion, five hundred fifty-six million, seventy-eight thousand, eight hundred seventy-three".