204104045 has 4 divisors (see below), whose sum is σ = 244924860. Its totient is φ = 163283232.

The previous prime is 204104029. The next prime is 204104053. The reversal of 204104045 is 540401402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89056969 + 115047076 = 9437^2 + 10726^2 .

It is a cyclic number.

It is not a de Polignac number, because 204104045 - 2⁴ = 204104029 is a prime.

It is a super-2 number, since 2×204104045² = 83316922370724050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 20410400 + ... + 20410409.

It is an arithmetic number, because the mean of its divisors is an integer number (61231215).

Almost surely, 2^204104045 is an apocalyptic number.

It is an amenable number.

204104045 is a deficient number, since it is larger than the sum of its proper divisors (40820815).

204104045 is an equidigital number, since it uses as much as digits as its factorization.

204104045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40820814.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 204104045 is about 14286.4986963216. The cubic root of 204104045 is about 588.7765944986.

Adding to 204104045 its reverse (540401402), we get a palindrome (744505447).

The spelling of 204104045 in words is "two hundred four million, one hundred four thousand, forty-five".