18874444 has 12 divisors (see below), whose sum is σ = 34466544. Its totient is φ = 9026864.

The previous prime is 18874439. The next prime is 18874459. The reversal of 18874444 is 44447881.

It is a junction number, because it is equal to n+sod(n) for n = 18874397 and 18874406.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102487 + ... + 102670.

It is an arithmetic number, because the mean of its divisors is an integer number (2872212).

Almost surely, 2^18874444 is an apocalyptic number.

It is an amenable number.

18874444 is a deficient number, since it is larger than the sum of its proper divisors (15592100).

18874444 is a wasteful number, since it uses less digits than its factorization.

18874444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205184 (or 205182 counting only the distinct ones).

The product of its digits is 114688, while the sum is 40.

The square root of 18874444 is about 4344.4728103649. The cubic root of 18874444 is about 266.2510867141.

The spelling of 18874444 in words is "eighteen million, eight hundred seventy-four thousand, four hundred forty-four".