19685807985783 has 8 divisors (see below), whose sum is σ = 27152838601200. Its totient is φ = 12671324680448.

The previous prime is 19685807985773. The next prime is 19685807985827. The reversal of 19685807985783 is 38758970858691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19685807985783 - 2¹² = 19685807981687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19685807985696 and 19685807985705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19685807985743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113136827418 + ... + 113136827591.

It is an arithmetic number, because the mean of its divisors is an integer number (3394104825150).

Almost surely, 2^{19685807985783} is an apocalyptic number.

19685807985783 is a deficient number, since it is larger than the sum of its proper divisors (7467030615417).

19685807985783 is a wasteful number, since it uses less digits than its factorization.

19685807985783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226273655041.

The product of its (nonzero) digits is 7315660800, while the sum is 84.

The spelling of 19685807985783 in words is "nineteen trillion, six hundred eighty-five billion, eight hundred seven million, nine hundred eighty-five thousand, seven hundred eighty-three".