204311042406 has 12 divisors (see below), whose sum is σ = 442673925252. Its totient is φ = 68103680796.

The previous prime is 204311042399. The next prime is 204311042431. The reversal of 204311042406 is 604240113402.

It is a happy number.

204311042406 is a `hidden beast` number, since 204 + 3 + 1 + 10 + 42 + 406 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 204311042406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5675306716 + ... + 5675306751.

It is an arithmetic number, because the mean of its divisors is an integer number (36889493771).

Almost surely, 2^204311042406 is an apocalyptic number.

204311042406 is an abundant number, since it is smaller than the sum of its proper divisors (238362882846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204311042406 is a wasteful number, since it uses less digits than its factorization.

204311042406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11350613475 (or 11350613472 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 204311042406 its reverse (604240113402), we get a palindrome (808551155808).

The spelling of 204311042406 in words is "two hundred four billion, three hundred eleven million, forty-two thousand, four hundred six".