18867944 has 16 divisors (see below), whose sum is σ = 35430720. Its totient is φ = 9419760.

The previous prime is 18867923. The next prime is 18867967. The reversal of 18867944 is 44976881.

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, 5729 + ... + 8399.

It is an arithmetic number, because the mean of its divisors is an integer number (2214420).

Almost surely, 2^18867944 is an apocalyptic number.

It is an amenable number.

18867944 is a deficient number, since it is larger than the sum of its proper divisors (16562776).

18867944 is a wasteful number, since it uses less digits than its factorization.

18867944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560 (or 3556 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 18867944 is about 4343.7246689909. The cubic root of 18867944 is about 266.2205192659.

The spelling of 18867944 in words is "eighteen million, eight hundred sixty-seven thousand, nine hundred forty-four".