18959431105 has 8 divisors (see below), whose sum is σ = 23948755200. Its totient is φ = 14369252976.

The previous prime is 18959431091. The next prime is 18959431133. The reversal of 18959431105 is 50113495981.

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 18959431105 - 2⁷ = 18959430977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99786385 + ... + 99786574.

It is an arithmetic number, because the mean of its divisors is an integer number (2993594400).

Almost surely, 2^18959431105 is an apocalyptic number.

It is an amenable number.

18959431105 is a deficient number, since it is larger than the sum of its proper divisors (4989324095).

18959431105 is a wasteful number, since it uses less digits than its factorization.

18959431105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199572983.

The product of its (nonzero) digits is 194400, while the sum is 46.

The spelling of 18959431105 in words is "eighteen billion, nine hundred fifty-nine million, four hundred thirty-one thousand, one hundred five".