18294131191 has 4 divisors (see below), whose sum is σ = 20907578512. Its totient is φ = 15680683872.

The previous prime is 18294131147. The next prime is 18294131213. The reversal of 18294131191 is 19113149281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19113149281 = 83 ⋅230278907.

It is not a de Polignac number, because 18294131191 - 2¹⁷ = 18294000119 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 (18294111191) 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 3 ways as a sum of consecutive naturals, for example, 1306723650 + ... + 1306723663.

It is an arithmetic number, because the mean of its divisors is an integer number (5226894628).

Almost surely, 2^18294131191 is an apocalyptic number.

18294131191 is a deficient number, since it is larger than the sum of its proper divisors (2613447321).

18294131191 is an equidigital number, since it uses as much as digits as its factorization.

18294131191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613447320.

The product of its digits is 15552, while the sum is 40.

The spelling of 18294131191 in words is "eighteen billion, two hundred ninety-four million, one hundred thirty-one thousand, one hundred ninety-one".