18051249 has 8 divisors (see below), whose sum is σ = 24107392. Its totient is φ = 12014640.

The previous prime is 18051233. The next prime is 18051277. The reversal of 18051249 is 94215081.

It is a happy number.

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

It is not a de Polignac number, because 18051249 - 2⁴ = 18051233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18051289) 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, 2569 + ... + 6534.

It is an arithmetic number, because the mean of its divisors is an integer number (3013424).

Almost surely, 2^18051249 is an apocalyptic number.

It is an amenable number.

18051249 is a deficient number, since it is larger than the sum of its proper divisors (6056143).

18051249 is an equidigital number, since it uses as much as digits as its factorization.

18051249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9767.

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

The square root of 18051249 is about 4248.6761467544. The cubic root of 18051249 is about 262.3226266597.

The spelling of 18051249 in words is "eighteen million, fifty-one thousand, two hundred forty-nine".