18344873871 has 8 divisors (see below), whose sum is σ = 27177590960. Its totient is φ = 12229915896.

The previous prime is 18344873861. The next prime is 18344873873. The reversal of 18344873871 is 17837844381.

18344873871 is a `hidden beast` number, since 1 + 83 + 4 + 487 + 3 + 87 + 1 = 666.

It is not a de Polignac number, because 18344873871 - 2²³ = 18336485263 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 (18344873873) 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, 339719860 + ... + 339719913.

It is an arithmetic number, because the mean of its divisors is an integer number (3397198870).

Almost surely, 2^18344873871 is an apocalyptic number.

18344873871 is a deficient number, since it is larger than the sum of its proper divisors (8832717089).

18344873871 is an equidigital number, since it uses as much as digits as its factorization.

18344873871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679439782 (or 679439776 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 18344873871 in words is "eighteen billion, three hundred forty-four million, eight hundred seventy-three thousand, eight hundred seventy-one".