19759686845 has 16 divisors (see below), whose sum is σ = 23810210112. Its totient is φ = 15742097280.

The previous prime is 19759686841. The next prime is 19759686847. The reversal of 19759686845 is 54868695791.

It is a happy number.

It is not a de Polignac number, because 19759686845 - 2² = 19759686841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19759686841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3012089 + ... + 3018641.

It is an arithmetic number, because the mean of its divisors is an integer number (1488138132).

Almost surely, 2^19759686845 is an apocalyptic number.

It is an amenable number.

19759686845 is a deficient number, since it is larger than the sum of its proper divisors (4050523267).

19759686845 is a wasteful number, since it uses less digits than its factorization.

19759686845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8972.

The product of its digits is 130636800, while the sum is 68.

The spelling of 19759686845 in words is "nineteen billion, seven hundred fifty-nine million, six hundred eighty-six thousand, eight hundred forty-five".