19687694912 has 28 divisors (see below), whose sum is σ = 39562308480. Its totient is φ = 9719239296.

The previous prime is 19687694843. The next prime is 19687694981. The reversal of 19687694912 is 21949678691.

It is an interprime number because it is at equal distance from previous prime (19687694843) and next prime (19687694981).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941908 + ... + 1952019.

Almost surely, 2^19687694912 is an apocalyptic number.

It is an amenable number.

19687694912 is an abundant number, since it is smaller than the sum of its proper divisors (19874613568).

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

19687694912 is an equidigital number, since it uses as much as digits as its factorization.

19687694912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894018 (or 3894008 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 62.

The spelling of 19687694912 in words is "nineteen billion, six hundred eighty-seven million, six hundred ninety-four thousand, nine hundred twelve".