18248999 has 4 divisors (see below), whose sum is σ = 18273864. Its totient is φ = 18224136.

The previous prime is 18248981. The next prime is 18249017. The reversal of 18248999 is 99984281.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (18248981) and next prime (18249017).

It is a cyclic number.

It is not a de Polignac number, because 18248999 - 2¹² = 18244903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18248969) 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, 11297 + ... + 12810.

It is an arithmetic number, because the mean of its divisors is an integer number (4568466).

Almost surely, 2^18248999 is an apocalyptic number.

18248999 is a deficient number, since it is larger than the sum of its proper divisors (24865).

18248999 is an equidigital number, since it uses as much as digits as its factorization.

18248999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24864.

The product of its digits is 373248, while the sum is 50.

The square root of 18248999 is about 4271.8847128639. The cubic root of 18248999 is about 263.2770577105.

The spelling of 18248999 in words is "eighteen million, two hundred forty-eight thousand, nine hundred ninety-nine".