18127133 has 4 divisors (see below), whose sum is σ = 18140928. Its totient is φ = 18113340.

The previous prime is 18127127. The next prime is 18127163. The reversal of 18127133 is 33172181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33172181 = 7 ⋅4738883.

It is a cyclic number.

It is not a de Polignac number, because 18127133 - 2⁸ = 18126877 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 (18127163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4691 + ... + 7632.

It is an arithmetic number, because the mean of its divisors is an integer number (4535232).

Almost surely, 2^18127133 is an apocalyptic number.

It is an amenable number.

18127133 is a deficient number, since it is larger than the sum of its proper divisors (13795).

18127133 is a wasteful number, since it uses less digits than its factorization.

18127133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13794.

The product of its digits is 1008, while the sum is 26.

The square root of 18127133 is about 4257.5970922576. The cubic root of 18127133 is about 262.6896974990.

The spelling of 18127133 in words is "eighteen million, one hundred twenty-seven thousand, one hundred thirty-three".