19181688934 has 16 divisors (see below), whose sum is σ = 28815898320. Its totient is φ = 9576403200.

The previous prime is 19181688919. The next prime is 19181688941. The reversal of 19181688934 is 43988618191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5433682 + ... + 5437210.

It is an arithmetic number, because the mean of its divisors is an integer number (1800993645).

Almost surely, 2^19181688934 is an apocalyptic number.

19181688934 is a deficient number, since it is larger than the sum of its proper divisors (9634209386).

19181688934 is a wasteful number, since it uses less digits than its factorization.

19181688934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6855.

The product of its digits is 2985984, while the sum is 58.

The spelling of 19181688934 in words is "nineteen billion, one hundred eighty-one million, six hundred eighty-eight thousand, nine hundred thirty-four".