204202020042 has 12 divisors (see below), whose sum is σ = 442437710130. Its totient is φ = 68067340008.

The previous prime is 204202020017. The next prime is 204202020067. The reversal of 204202020042 is 240020202402.

204202020042 is a `hidden beast` number, since 2 + 0 + 420 + 2 + 0 + 200 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (204202020017) and next prime (204202020067).

It can be written as a sum of positive squares in only one way, i.e., 144733832721 + 59468187321 = 380439^2 + 243861^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11344556669 = 204202020042 / (2 + 0 + 4 + 2 + 0 + 2 + 0 + 2 + 0 + 0 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 204202019997 and 204202020024.

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, 5672278317 + ... + 5672278352.

Almost surely, 2^204202020042 is an apocalyptic number.

204202020042 is an abundant number, since it is smaller than the sum of its proper divisors (238235690088).

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

204202020042 is a wasteful number, since it uses less digits than its factorization.

204202020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11344556677 (or 11344556674 counting only the distinct ones).

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

Adding to 204202020042 its reverse (240020202402), we get a palindrome (444222222444).

The spelling of 204202020042 in words is "two hundred four billion, two hundred two million, twenty thousand, forty-two".