19658854918 has 16 divisors (see below), whose sum is σ = 29592034560. Its totient is φ = 9794905216.

The previous prime is 19658854909. The next prime is 19658854931. The reversal of 19658854918 is 81945885691.

It is a self number, because there is not a number n which added to its sum of digits gives 19658854918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645723 + ... + 675481.

It is an arithmetic number, because the mean of its divisors is an integer number (1849502160).

Almost surely, 2^19658854918 is an apocalyptic number.

19658854918 is a deficient number, since it is larger than the sum of its proper divisors (9933179642).

19658854918 is a wasteful number, since it uses less digits than its factorization.

19658854918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30911.

The product of its digits is 24883200, while the sum is 64.

The spelling of 19658854918 in words is "nineteen billion, six hundred fifty-eight million, eight hundred fifty-four thousand, nine hundred eighteen".