19712205837 has 12 divisors (see below), whose sum is σ = 28523767584. Its totient is φ = 13118125320.

The previous prime is 19712205811. The next prime is 19712205871. The reversal of 19712205837 is 73850221791.

It is a de Polignac number, because none of the positive numbers 2^k-19712205837 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19712205792 and 19712205801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19712205437) 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, 1940089 + ... + 1950222.

It is an arithmetic number, because the mean of its divisors is an integer number (2376980632).

Almost surely, 2^19712205837 is an apocalyptic number.

It is an amenable number.

19712205837 is a deficient number, since it is larger than the sum of its proper divisors (8811561747).

19712205837 is a wasteful number, since it uses less digits than its factorization.

19712205837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890880 (or 3890877 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 19712205837 in words is "nineteen billion, seven hundred twelve million, two hundred five thousand, eight hundred thirty-seven".