18873444 has 24 divisors (see below), whose sum is σ = 44312800. Its totient is φ = 6251904.

The previous prime is 18873419. The next prime is 18873467. The reversal of 18873444 is 44437881.

It is a super-2 number, since 2×18873444² = 712413776842272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869 + ... + 6780.

Almost surely, 2^18873444 is an apocalyptic number.

It is an amenable number.

18873444 is an abundant number, since it is smaller than the sum of its proper divisors (25439356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18873444 is a wasteful number, since it uses less digits than its factorization.

18873444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9819 (or 9817 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 18873444 is about 4344.3577200778. The cubic root of 18873444 is about 266.2463844866.

The spelling of 18873444 in words is "eighteen million, eight hundred seventy-three thousand, four hundred forty-four".