18879779727699 has 24 divisors (see below), whose sum is σ = 27980433185040. Its totient is φ = 11313725660160.

The previous prime is 18879779727667. The next prime is 18879779727707. The reversal of 18879779727699 is 99672797797881.

It is not a de Polignac number, because 18879779727699 - 2⁵ = 18879779727667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18879779727499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292161022 + ... + 292225635.

It is an arithmetic number, because the mean of its divisors is an integer number (1165851382710).

Almost surely, 2^{18879779727699} is an apocalyptic number.

18879779727699 is a deficient number, since it is larger than the sum of its proper divisors (9100653457341).

18879779727699 is a wasteful number, since it uses less digits than its factorization.

18879779727699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584386771 (or 584386760 counting only the distinct ones).

The product of its digits is 84687918336, while the sum is 96.

The spelling of 18879779727699 in words is "eighteen trillion, eight hundred seventy-nine billion, seven hundred seventy-nine million, seven hundred twenty-seven thousand, six hundred ninety-nine".