204405836 has 12 divisors (see below), whose sum is σ = 359989728. Its totient is φ = 101551632.

The previous prime is 204405823. The next prime is 204405881. The reversal of 204405836 is 638504402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162116 + ... + 163371.

It is an arithmetic number, because the mean of its divisors is an integer number (29999144).

Almost surely, 2^204405836 is an apocalyptic number.

It is an amenable number.

204405836 is a deficient number, since it is larger than the sum of its proper divisors (155583892).

204405836 is a wasteful number, since it uses less digits than its factorization.

204405836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325648 (or 325646 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 204405836 is about 14297.0568999357. The cubic root of 204405836 is about 589.0666425997.

The spelling of 204405836 in words is "two hundred four million, four hundred five thousand, eight hundred thirty-six".