18325659133 has 4 divisors (see below), whose sum is σ = 19403639100. Its totient is φ = 17247679168.

The previous prime is 18325659103. The next prime is 18325659169. The reversal of 18325659133 is 33195652381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33195652381 = 19 ⋅1747139599.

It can be written as a sum of positive squares in 2 ways, for example, as 13611188889 + 4714470244 = 116667^2 + 68662^2 .

It is a cyclic number.

It is not a de Polignac number, because 18325659133 - 2⁹ = 18325658621 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 (18325659103) 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 3 ways as a sum of consecutive naturals, for example, 538989958 + ... + 538989991.

It is an arithmetic number, because the mean of its divisors is an integer number (4850909775).

Almost surely, 2^18325659133 is an apocalyptic number.

It is an amenable number.

18325659133 is a deficient number, since it is larger than the sum of its proper divisors (1077979967).

18325659133 is a wasteful number, since it uses less digits than its factorization.

18325659133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077979966.

The product of its digits is 583200, while the sum is 46.

The spelling of 18325659133 in words is "eighteen billion, three hundred twenty-five million, six hundred fifty-nine thousand, one hundred thirty-three".