18338406338 has 32 divisors (see below), whose sum is σ = 32312856576. Its totient is φ = 7642062288.

The previous prime is 18338406313. The next prime is 18338406353. The reversal of 18338406338 is 83360483381.

It is a junction number, because it is equal to n+sod(n) for n = 18338406292 and 18338406301.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 65945 + ... + 202547.

It is an arithmetic number, because the mean of its divisors is an integer number (1009776768).

Almost surely, 2^18338406338 is an apocalyptic number.

18338406338 is a deficient number, since it is larger than the sum of its proper divisors (13974450238).

18338406338 is a wasteful number, since it uses less digits than its factorization.

18338406338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136878.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 18338406338 in words is "eighteen billion, three hundred thirty-eight million, four hundred six thousand, three hundred thirty-eight".