19388923792 has 40 divisors (see below), whose sum is σ = 43180825536. Its totient is φ = 8261498496.

The previous prime is 19388923781. The next prime is 19388923859. The reversal of 19388923792 is 29732988391.

It is a self number, because there is not a number n which added to its sum of digits gives 19388923792.

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, 480958 + ... + 519709.

Almost surely, 2^19388923792 is an apocalyptic number.

It is an amenable number.

19388923792 is an abundant number, since it is smaller than the sum of its proper divisors (23791901744).

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

19388923792 is a wasteful number, since it uses less digits than its factorization.

19388923792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000855 (or 1000849 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The spelling of 19388923792 in words is "nineteen billion, three hundred eighty-eight million, nine hundred twenty-three thousand, seven hundred ninety-two".