18639480340924 has 12 divisors (see below), whose sum is σ = 32656115677248. Its totient is φ = 9309161576000.

The previous prime is 18639480340879. The next prime is 18639480340927. The reversal of 18639480340924 is 42904308493681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18639480340927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2644644652 + ... + 2644651699.

It is an arithmetic number, because the mean of its divisors is an integer number (2721342973104).

Almost surely, 2^{18639480340924} is an apocalyptic number.

It is an amenable number.

18639480340924 is a deficient number, since it is larger than the sum of its proper divisors (14016635336324).

18639480340924 is a wasteful number, since it uses less digits than its factorization.

18639480340924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5289297236 (or 5289297234 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 61.

The spelling of 18639480340924 in words is "eighteen trillion, six hundred thirty-nine billion, four hundred eighty million, three hundred forty thousand, nine hundred twenty-four".