204435664 has 20 divisors (see below), whose sum is σ = 396787104. Its totient is φ = 102039008.

The previous prime is 204435653. The next prime is 204435667. The reversal of 204435664 is 466534402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204435667) 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, 1492 + ... + 20275.

Almost surely, 2^204435664 is an apocalyptic number.

It is an amenable number.

204435664 is a deficient number, since it is larger than the sum of its proper divisors (192351440).

204435664 is a wasteful number, since it uses less digits than its factorization.

204435664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22362 (or 22356 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 204435664 is about 14298.1000136382. The cubic root of 204435664 is about 589.0952944647.

The spelling of 204435664 in words is "two hundred four million, four hundred thirty-five thousand, six hundred sixty-four".