18189157179 has 4 divisors (see below), whose sum is σ = 24252209576. Its totient is φ = 12126104784.

The previous prime is 18189157171. The next prime is 18189157187. The reversal of 18189157179 is 97175198181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97175198181 = 3 ⋅32391732727.

It is an interprime number because it is at equal distance from previous prime (18189157171) and next prime (18189157187).

It is not a de Polignac number, because 18189157179 - 2³ = 18189157171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18189157171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3031526194 + ... + 3031526199.

It is an arithmetic number, because the mean of its divisors is an integer number (6063052394).

Almost surely, 2^18189157179 is an apocalyptic number.

18189157179 is a deficient number, since it is larger than the sum of its proper divisors (6063052397).

18189157179 is an equidigital number, since it uses as much as digits as its factorization.

18189157179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6063052396.

The product of its digits is 1270080, while the sum is 57.

The spelling of 18189157179 in words is "eighteen billion, one hundred eighty-nine million, one hundred fifty-seven thousand, one hundred seventy-nine".