204504113 has 4 divisors (see below), whose sum is σ = 223095408. Its totient is φ = 185912820.

The previous prime is 204504037. The next prime is 204504119. The reversal of 204504113 is 311405402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204504113 - 2²⁰ = 203455537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204504119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9295631 + ... + 9295652.

It is an arithmetic number, because the mean of its divisors is an integer number (55773852).

Almost surely, 2^204504113 is an apocalyptic number.

It is an amenable number.

204504113 is a deficient number, since it is larger than the sum of its proper divisors (18591295).

204504113 is a wasteful number, since it uses less digits than its factorization.

204504113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18591294.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 204504113 is about 14300.4934530246. The cubic root of 204504113 is about 589.1610339473.

Adding to 204504113 its reverse (311405402), we get a palindrome (515909515).

The spelling of 204504113 in words is "two hundred four million, five hundred four thousand, one hundred thirteen".