18347944 has 16 divisors (see below), whose sum is σ = 34675200. Its totient is φ = 9101232.

The previous prime is 18347941. The next prime is 18347957. The reversal of 18347944 is 44974381.

It is a junction number, because it is equal to n+sod(n) for n = 18347897 and 18347906.

It is not an unprimeable number, because it can be changed into a prime (18347941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8014 + ... + 10045.

It is an arithmetic number, because the mean of its divisors is an integer number (2167200).

Almost surely, 2^18347944 is an apocalyptic number.

It is an amenable number.

18347944 is a deficient number, since it is larger than the sum of its proper divisors (16327256).

18347944 is a wasteful number, since it uses less digits than its factorization.

18347944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18192 (or 18188 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 18347944 is about 4283.4500113810. The cubic root of 18347944 is about 263.7520245721.

It can be divided in two parts, 18347 and 944, that added together give a palindrome (19291).

The spelling of 18347944 in words is "eighteen million, three hundred forty-seven thousand, nine hundred forty-four".