18873844 has 12 divisors (see below), whose sum is σ = 36031968. Its totient is φ = 8579000.

The previous prime is 18873797. The next prime is 18873853. The reversal of 18873844 is 44837881.

It is a self number, because there is not a number n which added to its sum of digits gives 18873844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214432 + ... + 214519.

It is an arithmetic number, because the mean of its divisors is an integer number (3002664).

Almost surely, 2^18873844 is an apocalyptic number.

It is an amenable number.

18873844 is a deficient number, since it is larger than the sum of its proper divisors (17158124).

18873844 is a wasteful number, since it uses less digits than its factorization.

18873844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428966 (or 428964 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 18873844 is about 4344.4037565585. The cubic root of 18873844 is about 266.2482653975.

The spelling of 18873844 in words is "eighteen million, eight hundred seventy-three thousand, eight hundred forty-four".