19385196864 has 56 divisors (see below), whose sum is σ = 55952733408. Its totient is φ = 5874301440.

The previous prime is 19385196851. The next prime is 19385196871. The reversal of 19385196864 is 46869158391.

It is a junction number, because it is equal to n+sod(n) for n = 19385196798 and 19385196807.

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, 4587187 + ... + 4591410.

Almost surely, 2^19385196864 is an apocalyptic number.

It is an amenable number.

19385196864 is an abundant number, since it is smaller than the sum of its proper divisors (36567536544).

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

19385196864 is a wasteful number, since it uses less digits than its factorization.

19385196864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178623 (or 9178613 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 60.

The spelling of 19385196864 in words is "nineteen billion, three hundred eighty-five million, one hundred ninety-six thousand, eight hundred sixty-four".