204004004 has 6 divisors (see below), whose sum is σ = 357007014. Its totient is φ = 102002000.

The previous prime is 204004001. The next prime is 204004013. The reversal of 204004004 is 400400402.

It can be written as a sum of positive squares in only one way, i.e., 200279104 + 3724900 = 14152^2 + 1930^2 .

204004004 is a modest number, since divided by 4004 gives 204 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 204004004.

It is not an unprimeable number, because it can be changed into a prime (204004001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500497 + ... + 25500504.

It is an arithmetic number, because the mean of its divisors is an integer number (59501169).

Almost surely, 2^204004004 is an apocalyptic number.

It is an amenable number.

204004004 is a deficient number, since it is larger than the sum of its proper divisors (153003010).

204004004 is a wasteful number, since it uses less digits than its factorization.

204004004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51001005 (or 51001003 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204004004 is about 14282.9970244343. The cubic root of 204004004 is about 588.6803830697.

Adding to 204004004 its reverse (400400402), we get a palindrome (604404406).

The spelling of 204004004 in words is "two hundred four million, four thousand, four".