18102243 has 4 divisors (see below), whose sum is σ = 24136328. Its totient is φ = 12068160.

The previous prime is 18102241. The next prime is 18102247. The reversal of 18102243 is 34220181.

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

It is not a de Polignac number, because 18102243 - 2¹ = 18102241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18102241) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3017038 + ... + 3017043.

It is an arithmetic number, because the mean of its divisors is an integer number (6034082).

Almost surely, 2^18102243 is an apocalyptic number.

18102243 is a deficient number, since it is larger than the sum of its proper divisors (6034085).

18102243 is an equidigital number, since it uses as much as digits as its factorization.

18102243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034084.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18102243 is about 4254.6730779227. The cubic root of 18102243 is about 262.5694111229.

The spelling of 18102243 in words is "eighteen million, one hundred two thousand, two hundred forty-three".