19131894834 has 16 divisors (see below), whose sum is σ = 41207158272. Its totient is φ = 5886736848.

The previous prime is 19131894833. The next prime is 19131894853. The reversal of 19131894834 is 43849813191.

It is not an unprimeable number, because it can be changed into a prime (19131894833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122640274 + ... + 122640429.

It is an arithmetic number, because the mean of its divisors is an integer number (2575447392).

Almost surely, 2^19131894834 is an apocalyptic number.

19131894834 is an abundant number, since it is smaller than the sum of its proper divisors (22075263438).

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

19131894834 is a wasteful number, since it uses less digits than its factorization.

19131894834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245280721.

The product of its digits is 746496, while the sum is 51.

The spelling of 19131894834 in words is "nineteen billion, one hundred thirty-one million, eight hundred ninety-four thousand, eight hundred thirty-four".