18113530173 has 16 divisors (see below), whose sum is σ = 24690666240. Its totient is φ = 11806570496.

The previous prime is 18113530121. The next prime is 18113530177. The reversal of 18113530173 is 37103531181.

It is a cyclic number.

It is not a de Polignac number, because 18113530173 - 2⁹ = 18113529661 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113530177) 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, 72013 + ... + 203501.

It is an arithmetic number, because the mean of its divisors is an integer number (1543166640).

Almost surely, 2^18113530173 is an apocalyptic number.

It is an amenable number.

18113530173 is a deficient number, since it is larger than the sum of its proper divisors (6577136067).

18113530173 is a wasteful number, since it uses less digits than its factorization.

18113530173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132516.

The product of its (nonzero) digits is 7560, while the sum is 33.

The spelling of 18113530173 in words is "eighteen billion, one hundred thirteen million, five hundred thirty thousand, one hundred seventy-three".