20550873 has 16 divisors (see below), whose sum is σ = 32163200. Its totient is φ = 11425536.

The previous prime is 20550863. The next prime is 20550911. The reversal of 20550873 is 37805502.

It is a happy number.

It is not a de Polignac number, because 20550873 - 2⁴ = 20550857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20550873.

It is not an unprimeable number, because it can be changed into a prime (20550863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12448 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (2010200).

Almost surely, 2^20550873 is an apocalyptic number.

It is an amenable number.

20550873 is a deficient number, since it is larger than the sum of its proper divisors (11612327).

20550873 is a wasteful number, since it uses less digits than its factorization.

20550873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26496.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20550873 is about 4533.3070710024. The cubic root of 20550873 is about 273.9113899985.

The spelling of 20550873 in words is "twenty million, five hundred fifty thousand, eight hundred seventy-three".