204642040404 has 48 divisors (see below), whose sum is σ = 488913864768. Its totient is φ = 66601210368.

The previous prime is 204642040399. The next prime is 204642040453. The reversal of 204642040404 is 404040246402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035387 + ... + 1217090.

It is an arithmetic number, because the mean of its divisors is an integer number (10185705516).

Almost surely, 2^204642040404 is an apocalyptic number.

It is an amenable number.

204642040404 is an abundant number, since it is smaller than the sum of its proper divisors (284271824364).

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

204642040404 is a wasteful number, since it uses less digits than its factorization.

204642040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252664 (or 2252662 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 204642040404 its reverse (404040246402), we get a palindrome (608682286806).

The spelling of 204642040404 in words is "two hundred four billion, six hundred forty-two million, forty thousand, four hundred four".