18385203339 has 24 divisors (see below), whose sum is σ = 28989455040. Its totient is φ = 11611704456.

The previous prime is 18385203323. The next prime is 18385203413. The reversal of 18385203339 is 93330258381.

It is not a de Polignac number, because 18385203339 - 2⁴ = 18385203323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18385203294 and 18385203303.

It is not an unprimeable number, because it can be changed into a prime (18385203839) 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 23 ways as a sum of consecutive naturals, for example, 1986417 + ... + 1995650.

It is an arithmetic number, because the mean of its divisors is an integer number (1207893960).

Almost surely, 2^18385203339 is an apocalyptic number.

18385203339 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18385203339 is a deficient number, since it is larger than the sum of its proper divisors (10604251701).

18385203339 is an equidigital number, since it uses as much as digits as its factorization.

18385203339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982101 (or 3982089 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 18385203339 in words is "eighteen billion, three hundred eighty-five million, two hundred three thousand, three hundred thirty-nine".