19677985899 has 32 divisors (see below), whose sum is σ = 30859605504. Its totient is φ = 10996039680.

The previous prime is 19677985889. The next prime is 19677985903. The reversal of 19677985899 is 99858977691.

It is not a de Polignac number, because 19677985899 - 2⁵ = 19677985867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19677985819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354667 + ... + 406379.

It is an arithmetic number, because the mean of its divisors is an integer number (964362672).

Almost surely, 2^19677985899 is an apocalyptic number.

19677985899 is a deficient number, since it is larger than the sum of its proper divisors (11181619605).

19677985899 is a wasteful number, since it uses less digits than its factorization.

19677985899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52627.

The product of its digits is 617258880, while the sum is 78.

The spelling of 19677985899 in words is "nineteen billion, six hundred seventy-seven million, nine hundred eighty-five thousand, eight hundred ninety-nine".