19137791394 has 48 divisors (see below), whose sum is σ = 41778672000. Its totient is φ = 6331203648.

The previous prime is 19137791381. The next prime is 19137791411. The reversal of 19137791394 is 49319773191.

It is a self number, because there is not a number n which added to its sum of digits gives 19137791394.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1458507 + ... + 1471569.

It is an arithmetic number, because the mean of its divisors is an integer number (870389000).

Almost surely, 2^19137791394 is an apocalyptic number.

19137791394 is an abundant number, since it is smaller than the sum of its proper divisors (22640880606).

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

19137791394 is a wasteful number, since it uses less digits than its factorization.

19137791394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13679 (or 13676 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The spelling of 19137791394 in words is "nineteen billion, one hundred thirty-seven million, seven hundred ninety-one thousand, three hundred ninety-four".