18039133 has 8 divisors (see below), whose sum is σ = 21005568. Its totient is φ = 15170064.

The previous prime is 18039127. The next prime is 18039149. The reversal of 18039133 is 33193081.

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

It is a de Polignac number, because none of the positive numbers 2^k-18039133 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 (18039163) 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 7 ways as a sum of consecutive naturals, for example, 23941 + ... + 24682.

It is an arithmetic number, because the mean of its divisors is an integer number (2625696).

Almost surely, 2^18039133 is an apocalyptic number.

It is an amenable number.

18039133 is a deficient number, since it is larger than the sum of its proper divisors (2966435).

18039133 is an equidigital number, since it uses as much as digits as its factorization.

18039133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48683.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 18039133 is about 4247.2500515039. The cubic root of 18039133 is about 262.2639232000.

The spelling of 18039133 in words is "eighteen million, thirty-nine thousand, one hundred thirty-three".