19699739235844 has 12 divisors (see below), whose sum is σ = 34702851899968. Its totient is φ = 9784638693000.

The previous prime is 19699739235833. The next prime is 19699739235877. The reversal of 19699739235844 is 44853293799691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16307730552 + ... + 16307731759.

Almost surely, 2^{19699739235844} is an apocalyptic number.

It is an amenable number.

19699739235844 is a deficient number, since it is larger than the sum of its proper divisors (15003112664124).

19699739235844 is a wasteful number, since it uses less digits than its factorization.

19699739235844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32615462466 (or 32615462464 counting only the distinct ones).

The product of its digits is 3174474240, while the sum is 79.

The spelling of 19699739235844 in words is "nineteen trillion, six hundred ninety-nine billion, seven hundred thirty-nine million, two hundred thirty-five thousand, eight hundred forty-four".