204323564 has 6 divisors (see below), whose sum is σ = 357566244. Its totient is φ = 102161780.

The previous prime is 204323563. The next prime is 204323591. The reversal of 204323564 is 465323402.

It is not an unprimeable number, because it can be changed into a prime (204323563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25540442 + ... + 25540449.

It is an arithmetic number, because the mean of its divisors is an integer number (59594374).

Almost surely, 2^204323564 is an apocalyptic number.

It is an amenable number.

204323564 is a deficient number, since it is larger than the sum of its proper divisors (153242680).

204323564 is a wasteful number, since it uses less digits than its factorization.

204323564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51080895 (or 51080893 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 204323564 is about 14294.1793748365. The cubic root of 204323564 is about 588.9876001821.

Adding to 204323564 its reverse (465323402), we get a palindrome (669646966).

The spelling of 204323564 in words is "two hundred four million, three hundred twenty-three thousand, five hundred sixty-four".