18874449 has 24 divisors (see below), whose sum is σ = 30112992. Its totient is φ = 11296320.

The previous prime is 18874439. The next prime is 18874459. The reversal of 18874449 is 94447881.

It is an interprime number because it is at equal distance from previous prime (18874439) and next prime (18874459).

It is not a de Polignac number, because 18874449 - 2⁴ = 18874433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18874439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7069 + ... + 9365.

It is an arithmetic number, because the mean of its divisors is an integer number (1254708).

Almost surely, 2^18874449 is an apocalyptic number.

It is an amenable number.

18874449 is a deficient number, since it is larger than the sum of its proper divisors (11238543).

18874449 is a wasteful number, since it uses less digits than its factorization.

18874449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2394 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 18874449 is about 4344.4733858087. The cubic root of 18874449 is about 266.2511102248.

It can be divided in two parts, 1887 and 4449, that added together give a palindrome (6336).

The spelling of 18874449 in words is "eighteen million, eight hundred seventy-four thousand, four hundred forty-nine".