18550980189 has 12 divisors (see below), whose sum is σ = 30623840416. Its totient is φ = 10600560072.

The previous prime is 18550980157. The next prime is 18550980199. The reversal of 18550980189 is 98108905581.

18550980189 is a `hidden beast` number, since 1 + 8 + 550 + 9 + 8 + 0 + 1 + 89 = 666.

It is not a de Polignac number, because 18550980189 - 2⁵ = 18550980157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18550980139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147229939 + ... + 147230064.

Almost surely, 2^18550980189 is an apocalyptic number.

It is an amenable number.

18550980189 is a deficient number, since it is larger than the sum of its proper divisors (12072860227).

18550980189 is a wasteful number, since it uses less digits than its factorization.

18550980189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294460016 (or 294460013 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 54.

The spelling of 18550980189 in words is "eighteen billion, five hundred fifty million, nine hundred eighty thousand, one hundred eighty-nine".