18814359171 has 4 divisors (see below), whose sum is σ = 25085812232. Its totient is φ = 12542906112.

The previous prime is 18814359167. The next prime is 18814359173. The reversal of 18814359171 is 17195341881.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18814359171 - 2² = 18814359167 is a prime.

It is a super-2 number, since 2×18814359171² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18814359171.

It is not an unprimeable number, because it can be changed into a prime (18814359173) 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, 3135726526 + ... + 3135726531.

It is an arithmetic number, because the mean of its divisors is an integer number (6271453058).

Almost surely, 2^18814359171 is an apocalyptic number.

18814359171 is a deficient number, since it is larger than the sum of its proper divisors (6271453061).

18814359171 is an equidigital number, since it uses as much as digits as its factorization.

18814359171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271453060.

The product of its digits is 241920, while the sum is 48.

The spelling of 18814359171 in words is "eighteen billion, eight hundred fourteen million, three hundred fifty-nine thousand, one hundred seventy-one".