19874394688 has 56 divisors (see below), whose sum is σ = 39721113344. Its totient is φ = 9866188800.

The previous prime is 19874394671. The next prime is 19874394703. The reversal of 19874394688 is 88649347891.

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, 5658853 + ... + 5662363.

Almost surely, 2^19874394688 is an apocalyptic number.

It is an amenable number.

19874394688 is a deficient number, since it is larger than the sum of its proper divisors (19846718656).

19874394688 is a wasteful number, since it uses less digits than its factorization.

19874394688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4121 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 67.

The spelling of 19874394688 in words is "nineteen billion, eight hundred seventy-four million, three hundred ninety-four thousand, six hundred eighty-eight".