19694357912 has 16 divisors (see below), whose sum is σ = 37019014200. Its totient is φ = 9822620800.

The previous prime is 19694357911. The next prime is 19694357941. The reversal of 19694357912 is 21975349691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19694357911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066362 + ... + 3072777.

Almost surely, 2^19694357912 is an apocalyptic number.

It is an amenable number.

19694357912 is a deficient number, since it is larger than the sum of its proper divisors (17324656288).

19694357912 is a wasteful number, since it uses less digits than its factorization.

19694357912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139546 (or 6139542 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 56.

The spelling of 19694357912 in words is "nineteen billion, six hundred ninety-four million, three hundred fifty-seven thousand, nine hundred twelve".