18113774173 has 12 divisors (see below), whose sum is σ = 19918860444. Its totient is φ = 16459889600.

The previous prime is 18113774153. The next prime is 18113774221. The reversal of 18113774173 is 37147731181.

It can be written as a sum of positive squares in 2 ways, for example, as 6665416164 + 11448358009 = 81642^2 + 106997^2 .

It is not a de Polignac number, because 18113774173 - 2⁹ = 18113773661 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 (18113774113) by changing a digit.

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, 256665 + ... + 319537.

It is an arithmetic number, because the mean of its divisors is an integer number (1659905037).

Almost surely, 2^18113774173 is an apocalyptic number.

It is an amenable number.

18113774173 is a deficient number, since it is larger than the sum of its proper divisors (1805086271).

18113774173 is a wasteful number, since it uses less digits than its factorization.

18113774173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65276 (or 65265 counting only the distinct ones).

The product of its digits is 98784, while the sum is 43.

The spelling of 18113774173 in words is "eighteen billion, one hundred thirteen million, seven hundred seventy-four thousand, one hundred seventy-three".