18003398542329 has 8 divisors (see below), whose sum is σ = 24007494578752. Its totient is φ = 12000784100400.

The previous prime is 18003398542273. The next prime is 18003398542343. The reversal of 18003398542329 is 92324589330081.

It is a happy number.

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

It is not a de Polignac number, because 18003398542329 - 2³⁶ = 17934679065593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18003398542369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370370269 + ... + 370418874.

It is an arithmetic number, because the mean of its divisors is an integer number (3000936822344).

Almost surely, 2^{18003398542329} is an apocalyptic number.

It is an amenable number.

18003398542329 is a deficient number, since it is larger than the sum of its proper divisors (6004096036423).

18003398542329 is an equidigital number, since it uses as much as digits as its factorization.

18003398542329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740797247.

The product of its (nonzero) digits is 11197440, while the sum is 57.

The spelling of 18003398542329 in words is "eighteen trillion, three billion, three hundred ninety-eight million, five hundred forty-two thousand, three hundred twenty-nine".