204004105 has 8 divisors (see below), whose sum is σ = 245116872. Its totient is φ = 162995328.

The previous prime is 204004093. The next prime is 204004127. The reversal of 204004105 is 501400402.

It can be written as a sum of positive squares in 4 ways, for example, as 16 + 204004089 = 4^2 + 14283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204004105 - 2⁹ = 204003593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21612 + ... + 29581.

It is an arithmetic number, because the mean of its divisors is an integer number (30639609).

Almost surely, 2^204004105 is an apocalyptic number.

It is an amenable number.

204004105 is a deficient number, since it is larger than the sum of its proper divisors (41112767).

204004105 is an equidigital number, since it uses as much as digits as its factorization.

204004105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51995.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 204004105 is about 14283.0005601064. Note that the first 3 decimals coincide. The cubic root of 204004105 is about 588.6804802193.

Subtracting from 204004105 its sum of digits (16), we obtain a square (204004089 = 14283²).

Adding to 204004105 its reverse (501400402), we get a palindrome (705404507).

The spelling of 204004105 in words is "two hundred four million, four thousand, one hundred five".