204202420042 has 4 divisors (see below), whose sum is σ = 306303630066. Its totient is φ = 102101210020.

The previous prime is 204202419979. The next prime is 204202420091. The reversal of 204202420042 is 240024202402.

It is a happy number.

204202420042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 202635922801 + 1566497241 = 450151^2 + 39579^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204202419995 and 204202420022.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050605009 + ... + 51050605012.

Almost surely, 2^204202420042 is an apocalyptic number.

204202420042 is a deficient number, since it is larger than the sum of its proper divisors (102101210024).

204202420042 is a wasteful number, since it uses less digits than its factorization.

204202420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102101210023.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 204202420042 its reverse (240024202402), we get a palindrome (444226622444).

The spelling of 204202420042 in words is "two hundred four billion, two hundred two million, four hundred twenty thousand, forty-two".