18550139275 has 24 divisors (see below), whose sum is σ = 23899474800. Its totient is φ = 14265686400.

The previous prime is 18550139273. The next prime is 18550139297. The reversal of 18550139275 is 57293105581.

It is not a de Polignac number, because 18550139275 - 2¹ = 18550139273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18550139273) 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, 110160 + ... + 221890.

It is an arithmetic number, because the mean of its divisors is an integer number (995811450).

Almost surely, 2^18550139275 is an apocalyptic number.

18550139275 is a deficient number, since it is larger than the sum of its proper divisors (5349335525).

18550139275 is a wasteful number, since it uses less digits than its factorization.

18550139275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111999 (or 111994 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 46.

The spelling of 18550139275 in words is "eighteen billion, five hundred fifty million, one hundred thirty-nine thousand, two hundred seventy-five".