204242339978 has 16 divisors (see below), whose sum is σ = 312995310144. Its totient is φ = 99930758400.

The previous prime is 204242339969. The next prime is 204242339989. The reversal of 204242339978 is 879933242402.

204242339978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5026775 + ... + 5067242.

It is an arithmetic number, because the mean of its divisors is an integer number (19562206884).

Almost surely, 2^204242339978 is an apocalyptic number.

204242339978 is a deficient number, since it is larger than the sum of its proper divisors (108752970166).

204242339978 is a wasteful number, since it uses less digits than its factorization.

204242339978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094237.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 204242339978 in words is "two hundred four billion, two hundred forty-two million, three hundred thirty-nine thousand, nine hundred seventy-eight".