18034238 has 4 divisors (see below), whose sum is σ = 27051360. Its totient is φ = 9017118.

The previous prime is 18034217. The next prime is 18034241. The reversal of 18034238 is 83243081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83243081 = 37 ⋅2249813.

It is a self number, because there is not a number n which added to its sum of digits gives 18034238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4508558 + ... + 4508561.

It is an arithmetic number, because the mean of its divisors is an integer number (6762840).

Almost surely, 2^18034238 is an apocalyptic number.

18034238 is a deficient number, since it is larger than the sum of its proper divisors (9017122).

18034238 is an equidigital number, since it uses as much as digits as its factorization.

18034238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017121.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 18034238 is about 4246.6737571893. The cubic root of 18034238 is about 262.2401988883.

The spelling of 18034238 in words is "eighteen million, thirty-four thousand, two hundred thirty-eight".