18032449 has 4 divisors (see below), whose sum is σ = 18113536. Its totient is φ = 17951364.

The previous prime is 18032429. The next prime is 18032453. The reversal of 18032449 is 94423081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94423081 = 5779 ⋅16339.

It is a cyclic number.

It is not a de Polignac number, because 18032449 - 2⁷ = 18032321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18032449.

It is not an unprimeable number, because it can be changed into a prime (18032419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40209 + ... + 40654.

It is an arithmetic number, because the mean of its divisors is an integer number (4528384).

Almost surely, 2^18032449 is an apocalyptic number.

It is an amenable number.

18032449 is a deficient number, since it is larger than the sum of its proper divisors (81087).

18032449 is an equidigital number, since it uses as much as digits as its factorization.

18032449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81086.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18032449 is about 4246.4631165242. The cubic root of 18032449 is about 262.2315271749.

It can be divided in two parts, 18032 and 449, that added together give a palindrome (18481).

The spelling of 18032449 in words is "eighteen million, thirty-two thousand, four hundred forty-nine".