204519012618 has 16 divisors (see below), whose sum is σ = 433099085760. Its totient is φ = 64162827456.

The previous prime is 204519012571. The next prime is 204519012623. The reversal of 204519012618 is 816210915402.

204519012618 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, 1002544078 + ... + 1002544281.

It is an arithmetic number, because the mean of its divisors is an integer number (27068692860).

Almost surely, 2^204519012618 is an apocalyptic number.

204519012618 is an abundant number, since it is smaller than the sum of its proper divisors (228580073142).

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

204519012618 is a wasteful number, since it uses less digits than its factorization.

204519012618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005088381.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 204519012618 in words is "two hundred four billion, five hundred nineteen million, twelve thousand, six hundred eighteen".