204004 has 6 divisors (see below), whose sum is σ = 357014. Its totient is φ = 102000.

The previous prime is 203999. The next prime is 204007. The reversal of 204004 is 400402.

204004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 10404 = 440^2 + 102^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (204007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25497 + ... + 25504.

2²⁰⁴⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

204004 is a deficient number, since it is larger than the sum of its proper divisors (153010).

204004 is a wasteful number, since it uses less digits than its factorization.

204004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51005 (or 51003 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 204004 is about 451.6680196782. The cubic root of 204004 is about 58.8680379222.

Adding to 204004 its reverse (400402), we get a palindrome (604406).

The spelling of 204004 in words is "two hundred four thousand, four", and thus it is an iban number.