204004020042 has 32 divisors (see below), whose sum is σ = 453536366400. Its totient is φ = 67972225104.

The previous prime is 204004020037. The next prime is 204004020131. The reversal of 204004020042 is 240020400402.

204004020042 is a `hidden beast` number, since 20 + 400 + 4 + 0 + 200 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204004019997 and 204004020024.

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, 681273 + ... + 933884.

It is an arithmetic number, because the mean of its divisors is an integer number (14173011450).

Almost surely, 2^204004020042 is an apocalyptic number.

204004020042 is an abundant number, since it is smaller than the sum of its proper divisors (249532346358).

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

204004020042 is a wasteful number, since it uses less digits than its factorization.

204004020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617507 (or 1617501 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 204004020042 its reverse (240020400402), we get a palindrome (444024420444).

The spelling of 204004020042 in words is "two hundred four billion, four million, twenty thousand, forty-two".