18000181793 has 16 divisors (see below), whose sum is σ = 20134509120. Its totient is φ = 16086378880.

The previous prime is 18000181789. The next prime is 18000181817. The reversal of 18000181793 is 39718100081.

It is not a de Polignac number, because 18000181793 - 2² = 18000181789 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18000181993) 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, 36080 + ... + 193137.

It is an arithmetic number, because the mean of its divisors is an integer number (1258406820).

Almost surely, 2^18000181793 is an apocalyptic number.

It is an amenable number.

18000181793 is a deficient number, since it is larger than the sum of its proper divisors (2134327327).

18000181793 is an equidigital number, since it uses as much as digits as its factorization.

18000181793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229309 (or 229287 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 38.

The spelling of 18000181793 in words is "eighteen billion, one hundred eighty-one thousand, seven hundred ninety-three".