204385845 has 32 divisors (see below), whose sum is σ = 339038208. Its totient is φ = 105069888.

The previous prime is 204385813. The next prime is 204385859. The reversal of 204385845 is 548583402.

It is not a de Polignac number, because 204385845 - 2⁵ = 204385813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45072 + ... + 49398.

It is an arithmetic number, because the mean of its divisors is an integer number (10594944).

Almost surely, 2^204385845 is an apocalyptic number.

It is an amenable number.

204385845 is a deficient number, since it is larger than the sum of its proper divisors (134652363).

204385845 is a wasteful number, since it uses less digits than its factorization.

204385845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449.

The product of its (nonzero) digits is 153600, while the sum is 39.

The square root of 204385845 is about 14296.3577529383. The cubic root of 204385845 is about 589.0474382962.

The spelling of 204385845 in words is "two hundred four million, three hundred eighty-five thousand, eight hundred forty-five".