18681941173 has 16 divisors (see below), whose sum is σ = 22100537344. Its totient is φ = 15457599360.

The previous prime is 18681941171. The next prime is 18681941177. The reversal of 18681941173 is 37114918681.

It is not a de Polignac number, because 18681941173 - 2¹ = 18681941171 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 (18681941171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251088 + ... + 316873.

It is an arithmetic number, because the mean of its divisors is an integer number (1381283584).

Almost surely, 2^18681941173 is an apocalyptic number.

It is an amenable number.

18681941173 is a deficient number, since it is larger than the sum of its proper divisors (3418596171).

18681941173 is a wasteful number, since it uses less digits than its factorization.

18681941173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568132.

The product of its digits is 290304, while the sum is 49.

The spelling of 18681941173 in words is "eighteen billion, six hundred eighty-one million, nine hundred forty-one thousand, one hundred seventy-three".