18779534904 has 128 divisors (see below), whose sum is σ = 51372195840. Its totient is φ = 5686267392.

The previous prime is 18779534819. The next prime is 18779534909. The reversal of 18779534904 is 40943597781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18779534909) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5239497 + ... + 5243079.

It is an arithmetic number, because the mean of its divisors is an integer number (401345280).

Almost surely, 2^18779534904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18779534904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25686097920).

18779534904 is an abundant number, since it is smaller than the sum of its proper divisors (32592660936).

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

18779534904 is a wasteful number, since it uses less digits than its factorization.

18779534904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869 (or 3865 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 18779534904 in words is "eighteen billion, seven hundred seventy-nine million, five hundred thirty-four thousand, nine hundred four".