18049693191 has 8 divisors (see below), whose sum is σ = 24370894080. Its totient is φ = 11880810552.

The previous prime is 18049693171. The next prime is 18049693213. The reversal of 18049693191 is 19139694081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18049693191 - 2²⁵ = 18016138759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049693171) 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 7 ways as a sum of consecutive naturals, for example, 38079285 + ... + 38079758.

It is an arithmetic number, because the mean of its divisors is an integer number (3046361760).

Almost surely, 2^18049693191 is an apocalyptic number.

18049693191 is a deficient number, since it is larger than the sum of its proper divisors (6321200889).

18049693191 is an equidigital number, since it uses as much as digits as its factorization.

18049693191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76159125.

The product of its (nonzero) digits is 419904, while the sum is 51.

The spelling of 18049693191 in words is "eighteen billion, forty-nine million, six hundred ninety-three thousand, one hundred ninety-one".