204020042 has 8 divisors (see below), whose sum is σ = 306507936. Its totient is φ = 101850732.

The previous prime is 204019979. The next prime is 204020153. The reversal of 204020042 is 240020402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 204019999 and 204020026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78038 + ... + 80609.

It is an arithmetic number, because the mean of its divisors is an integer number (38313492).

Almost surely, 2^204020042 is an apocalyptic number.

204020042 is a deficient number, since it is larger than the sum of its proper divisors (102487894).

204020042 is a wasteful number, since it uses less digits than its factorization.

204020042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159292.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204020042 is about 14283.5584501902. The cubic root of 204020042 is about 588.6958092516.

Adding to 204020042 its reverse (240020402), we get a palindrome (444040444).

The spelling of 204020042 in words is "two hundred four million, twenty thousand, forty-two".