18032133 has 8 divisors (see below), whose sum is σ = 27477568. Its totient is φ = 10304064.

The previous prime is 18032123. The next prime is 18032141. The reversal of 18032133 is 33123081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18032133 - 2⁴ = 18032117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 858673 = 18032133 / (1 + 8 + 0 + 3 + 2 + 1 + 3 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18032123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429316 + ... + 429357.

It is an arithmetic number, because the mean of its divisors is an integer number (3434696).

Almost surely, 2^18032133 is an apocalyptic number.

It is an amenable number.

18032133 is a deficient number, since it is larger than the sum of its proper divisors (9445435).

18032133 is an equidigital number, since it uses as much as digits as its factorization.

18032133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858683.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 18032133 is about 4246.4259089262. The cubic root of 18032133 is about 262.2299953873.

The spelling of 18032133 in words is "eighteen million, thirty-two thousand, one hundred thirty-three".