204431220042 has 64 divisors (see below), whose sum is σ = 471827841024. Its totient is φ = 57841076160.

The previous prime is 204431219981. The next prime is 204431220073. The reversal of 204431220042 is 240022134402.

It is a junction number, because it is equal to n+sod(n) for n = 204431219994 and 204431220021.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2850273 + ... + 2921115.

It is an arithmetic number, because the mean of its divisors is an integer number (7372310016).

Almost surely, 2^204431220042 is an apocalyptic number.

204431220042 is an abundant number, since it is smaller than the sum of its proper divisors (267396620982).

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

204431220042 is a wasteful number, since it uses less digits than its factorization.

204431220042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71523.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 204431220042 its reverse (240022134402), we get a palindrome (444453354444).

The spelling of 204431220042 in words is "two hundred four billion, four hundred thirty-one million, two hundred twenty thousand, forty-two".