19699739235848 has 128 divisors (see below), whose sum is σ = 45369986457600. Its totient is φ = 7826482566144.

The previous prime is 19699739235833. The next prime is 19699739235877. The reversal of 19699739235848 is 84853293799691.

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 31 ways as a sum of consecutive naturals, for example, 642863615 + ... + 642894257.

It is an arithmetic number, because the mean of its divisors is an integer number (354453019200).

Almost surely, 2^{19699739235848} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19699739235848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22684993228800).

19699739235848 is an abundant number, since it is smaller than the sum of its proper divisors (25670247221752).

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

19699739235848 is a wasteful number, since it uses less digits than its factorization.

19699739235848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40819 (or 40815 counting only the distinct ones).

The product of its digits is 6348948480, while the sum is 83.

The spelling of 19699739235848 in words is "nineteen trillion, six hundred ninety-nine billion, seven hundred thirty-nine million, two hundred thirty-five thousand, eight hundred forty-eight".