18063238 has 4 divisors (see below), whose sum is σ = 27094860. Its totient is φ = 9031618.

The previous prime is 18063217. The next prime is 18063277. The reversal of 18063238 is 83236081.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 4515808 + ... + 4515811.

It is an arithmetic number, because the mean of its divisors is an integer number (6773715).

Almost surely, 2^18063238 is an apocalyptic number.

18063238 is a deficient number, since it is larger than the sum of its proper divisors (9031622).

18063238 is an equidigital number, since it uses as much as digits as its factorization.

18063238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031621.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18063238 is about 4250.0868226426. The cubic root of 18063238 is about 262.3806889386.

The spelling of 18063238 in words is "eighteen million, sixty-three thousand, two hundred thirty-eight".