18909714186 has 24 divisors (see below), whose sum is σ = 44695688544. Its totient is φ = 5730216360.

The previous prime is 18909714143. The next prime is 18909714191. The reversal of 18909714186 is 68141790981.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47751606 + ... + 47752001.

It is an arithmetic number, because the mean of its divisors is an integer number (1862320356).

Almost surely, 2^18909714186 is an apocalyptic number.

18909714186 is an abundant number, since it is smaller than the sum of its proper divisors (25785974358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18909714186 is a wasteful number, since it uses less digits than its factorization.

18909714186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95503626 (or 95503623 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 54.

The spelling of 18909714186 in words is "eighteen billion, nine hundred nine million, seven hundred fourteen thousand, one hundred eighty-six".