18320342399 has 8 divisors (see below), whose sum is σ = 18457858800. Its totient is φ = 18182881216.

The previous prime is 18320342377. The next prime is 18320342401. The reversal of 18320342399 is 99324302381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18320342399 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 (18320342699) 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, 855677 + ... + 876825.

It is an arithmetic number, because the mean of its divisors is an integer number (2307232350).

Almost surely, 2^18320342399 is an apocalyptic number.

18320342399 is a deficient number, since it is larger than the sum of its proper divisors (137516401).

18320342399 is a wasteful number, since it uses less digits than its factorization.

18320342399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27609.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 18320342399 in words is "eighteen billion, three hundred twenty million, three hundred forty-two thousand, three hundred ninety-nine".