18368449 has 8 divisors (see below), whose sum is σ = 21217248. Its totient is φ = 15716160.

The previous prime is 18368447. The next prime is 18368453. The reversal of 18368449 is 94486381.

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

It is not a de Polignac number, because 18368449 - 2¹ = 18368447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18368447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48927 + ... + 49300.

It is an arithmetic number, because the mean of its divisors is an integer number (2652156).

Almost surely, 2^18368449 is an apocalyptic number.

It is an amenable number.

18368449 is a deficient number, since it is larger than the sum of its proper divisors (2848799).

18368449 is a wasteful number, since it uses less digits than its factorization.

18368449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98255.

The product of its digits is 165888, while the sum is 43.

The square root of 18368449 is about 4285.8428575952. The cubic root of 18368449 is about 263.8502412412.

The spelling of 18368449 in words is "eighteen million, three hundred sixty-eight thousand, four hundred forty-nine".