19515642934 has 16 divisors (see below), whose sum is σ = 29895065280. Its totient is φ = 9551476480.

The previous prime is 19515642929. The next prime is 19515642941. The reversal of 19515642934 is 43924651591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167899 + ... + 259270.

It is an arithmetic number, because the mean of its divisors is an integer number (1868441580).

Almost surely, 2^19515642934 is an apocalyptic number.

19515642934 is a deficient number, since it is larger than the sum of its proper divisors (10379422346).

19515642934 is a wasteful number, since it uses less digits than its factorization.

19515642934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427655.

The product of its digits is 1166400, while the sum is 49.

The spelling of 19515642934 in words is "nineteen billion, five hundred fifteen million, six hundred forty-two thousand, nine hundred thirty-four".