19688626971 has 12 divisors (see below), whose sum is σ = 30626753248. Its totient is φ = 12116078064.

The previous prime is 19688626963. The next prime is 19688626999. The reversal of 19688626971 is 17962688691.

It is not a de Polignac number, because 19688626971 - 2³ = 19688626963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19688626899 and 19688626908.

It is not an unprimeable number, because it can be changed into a prime (19688626921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84139315 + ... + 84139548.

Almost surely, 2^19688626971 is an apocalyptic number.

19688626971 is a deficient number, since it is larger than the sum of its proper divisors (10938126277).

19688626971 is a wasteful number, since it uses less digits than its factorization.

19688626971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168278882 (or 168278879 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 19688626971 in words is "nineteen billion, six hundred eighty-eight million, six hundred twenty-six thousand, nine hundred seventy-one".