18240159 has 32 divisors (see below), whose sum is σ = 29283840. Its totient is φ = 9878400.

The previous prime is 18240151. The next prime is 18240161. The reversal of 18240159 is 95104281.

It is a happy number.

It is not a de Polignac number, because 18240159 - 2³ = 18240151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240151) 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 31 ways as a sum of consecutive naturals, for example, 36904 + ... + 37394.

It is an arithmetic number, because the mean of its divisors is an integer number (915120).

Almost surely, 2^18240159 is an apocalyptic number.

18240159 is a deficient number, since it is larger than the sum of its proper divisors (11043681).

18240159 is a wasteful number, since it uses less digits than its factorization.

18240159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18240159 is about 4270.8499154150. The cubic root of 18240159 is about 263.2345394863.

The spelling of 18240159 in words is "eighteen million, two hundred forty thousand, one hundred fifty-nine".