18385329183 has 16 divisors (see below), whose sum is σ = 27043338336. Its totient is φ = 11038095360.

The previous prime is 18385329181. The next prime is 18385329187. The reversal of 18385329183 is 38192358381.

It is a happy number.

It is not a de Polignac number, because 18385329183 - 2¹ = 18385329181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385329181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5747410 + ... + 5750607.

It is an arithmetic number, because the mean of its divisors is an integer number (1690208646).

Almost surely, 2^18385329183 is an apocalyptic number.

18385329183 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18385329183 is a deficient number, since it is larger than the sum of its proper divisors (8658009153).

18385329183 is a wasteful number, since it uses less digits than its factorization.

18385329183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11498074.

The product of its digits is 1244160, while the sum is 51.

The spelling of 18385329183 in words is "eighteen billion, three hundred eighty-five million, three hundred twenty-nine thousand, one hundred eighty-three".