18249243 has 16 divisors (see below), whose sum is σ = 25044096. Its totient is φ = 11813760.

The previous prime is 18249241. The next prime is 18249247. The reversal of 18249243 is 34294281.

It is not a de Polignac number, because 18249243 - 2¹ = 18249241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18249241) 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 15 ways as a sum of consecutive naturals, for example, 30796 + ... + 31382.

It is an arithmetic number, because the mean of its divisors is an integer number (1565256).

Almost surely, 2^18249243 is an apocalyptic number.

18249243 is a deficient number, since it is larger than the sum of its proper divisors (6794853).

18249243 is a wasteful number, since it uses less digits than its factorization.

18249243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its digits is 13824, while the sum is 33.

The square root of 18249243 is about 4271.9132715915. The cubic root of 18249243 is about 263.2782310957.

The spelling of 18249243 in words is "eighteen million, two hundred forty-nine thousand, two hundred forty-three".