18009337918 has 32 divisors (see below), whose sum is σ = 31820664960. Its totient is φ = 7536382560.

The previous prime is 18009337909. The next prime is 18009337961. The reversal of 18009337918 is 81973390081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25321 + ... + 191467.

It is an arithmetic number, because the mean of its divisors is an integer number (994395780).

Almost surely, 2^18009337918 is an apocalyptic number.

18009337918 is a deficient number, since it is larger than the sum of its proper divisors (13811327042).

18009337918 is a wasteful number, since it uses less digits than its factorization.

18009337918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166552.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 18009337918 in words is "eighteen billion, nine million, three hundred thirty-seven thousand, nine hundred eighteen".