18033238 has 8 divisors (see below), whose sum is σ = 27263232. Its totient is φ = 8945496.

The previous prime is 18033233. The next prime is 18033241. The reversal of 18033238 is 83233081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18033233) 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, 35245 + ... + 35752.

It is an arithmetic number, because the mean of its divisors is an integer number (3407904).

Almost surely, 2^18033238 is an apocalyptic number.

18033238 is a deficient number, since it is larger than the sum of its proper divisors (9229994).

18033238 is a wasteful number, since it uses less digits than its factorization.

18033238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71126.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 18033238 is about 4246.5560163502. The cubic root of 18033238 is about 262.2353517185.

It can be divided in two parts, 1803 and 3238, that added together give a square (5041 = 71²).

The spelling of 18033238 in words is "eighteen million, thirty-three thousand, two hundred thirty-eight".