18180249 has 16 divisors (see below), whose sum is σ = 24806400. Its totient is φ = 11840400.

The previous prime is 18180223. The next prime is 18180269. The reversal of 18180249 is 94208181.

It is not a de Polignac number, because 18180249 - 2⁹ = 18179737 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18180269) 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 15 ways as a sum of consecutive naturals, for example, 30052 + ... + 30650.

It is an arithmetic number, because the mean of its divisors is an integer number (1550400).

Almost surely, 2^18180249 is an apocalyptic number.

It is an amenable number.

18180249 is a deficient number, since it is larger than the sum of its proper divisors (6626151).

18180249 is a wasteful number, since it uses less digits than its factorization.

18180249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18180249 is about 4263.8303202637. The cubic root of 18180249 is about 262.9460244788.

The spelling of 18180249 in words is "eighteen million, one hundred eighty thousand, two hundred forty-nine".