18033113 has 4 divisors (see below), whose sum is σ = 20609280. Its totient is φ = 15456948.

The previous prime is 18033083. The next prime is 18033133. The reversal of 18033113 is 31133081.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 18033113 - 2⁶ = 18033049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18033133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288073 + ... + 1288086.

It is an arithmetic number, because the mean of its divisors is an integer number (5152320).

Almost surely, 2^18033113 is an apocalyptic number.

It is an amenable number.

18033113 is a deficient number, since it is larger than the sum of its proper divisors (2576167).

18033113 is an equidigital number, since it uses as much as digits as its factorization.

18033113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576166.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 18033113 is about 4246.5412985158. The cubic root of 18033113 is about 262.2347458096.

Adding to 18033113 its reverse (31133081), we get a palindrome (49166194).

The spelling of 18033113 in words is "eighteen million, thirty-three thousand, one hundred thirteen".