18140243 has 8 divisors (see below), whose sum is σ = 19891200. Its totient is φ = 16406280.

The previous prime is 18140219. The next prime is 18140267. The reversal of 18140243 is 34204181.

It is an interprime number because it is at equal distance from previous prime (18140219) and next prime (18140267).

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

It is not a de Polignac number, because 18140243 - 2⁶ = 18140179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18140203) 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, 1955 + ... + 6332.

It is an arithmetic number, because the mean of its divisors is an integer number (2486400).

Almost surely, 2^18140243 is an apocalyptic number.

18140243 is a deficient number, since it is larger than the sum of its proper divisors (1750957).

18140243 is a wasteful number, since it uses less digits than its factorization.

18140243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8497.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 18140243 is about 4259.1364148146. The cubic root of 18140243 is about 262.7530101776.

The spelling of 18140243 in words is "eighteen million, one hundred forty thousand, two hundred forty-three".