18168878329 has 8 divisors (see below), whose sum is σ = 20765248128. Its totient is φ = 15572712480.

The previous prime is 18168878311. The next prime is 18168878339. The reversal of 18168878329 is 92387886181.

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

It is a cyclic number.

It is not a de Polignac number, because 18168878329 - 2⁹ = 18168877817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18168878339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316749 + ... + 369685.

It is an arithmetic number, because the mean of its divisors is an integer number (2595656016).

Almost surely, 2^18168878329 is an apocalyptic number.

It is an amenable number.

18168878329 is a deficient number, since it is larger than the sum of its proper divisors (2596369799).

18168878329 is an equidigital number, since it uses as much as digits as its factorization.

18168878329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101975.

The product of its digits is 9289728, while the sum is 61.

The spelling of 18168878329 in words is "eighteen billion, one hundred sixty-eight million, eight hundred seventy-eight thousand, three hundred twenty-nine".