204905236 has 12 divisors (see below), whose sum is σ = 358836660. Its totient is φ = 102380480.

The previous prime is 204905209. The next prime is 204905237. The reversal of 204905236 is 632509402.

It can be written as a sum of positive squares in 2 ways, for example, as 26522500 + 178382736 = 5150^2 + 13356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204905198 and 204905207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204905237) 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 3 ways as a sum of consecutive naturals, for example, 11371 + ... + 23218.

It is an arithmetic number, because the mean of its divisors is an integer number (29903055).

Almost surely, 2^204905236 is an apocalyptic number.

It is an amenable number.

204905236 is a deficient number, since it is larger than the sum of its proper divisors (153931424).

204905236 is a wasteful number, since it uses less digits than its factorization.

204905236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36074 (or 36072 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 204905236 is about 14314.5113783182. The cubic root of 204905236 is about 589.5459841452.

The spelling of 204905236 in words is "two hundred four million, nine hundred five thousand, two hundred thirty-six".