18747944 has 16 divisors (see below), whose sum is σ = 36681120. Its totient is φ = 8966320.

The previous prime is 18747919. The next prime is 18747959. The reversal of 18747944 is 44974781.

It is a junction number, because it is equal to n+sod(n) for n = 18747895 and 18747904.

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, 50762 + ... + 51129.

It is an arithmetic number, because the mean of its divisors is an integer number (2292570).

Almost surely, 2^18747944 is an apocalyptic number.

It is an amenable number.

18747944 is a deficient number, since it is larger than the sum of its proper divisors (17933176).

18747944 is a wasteful number, since it uses less digits than its factorization.

18747944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101920 (or 101916 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 18747944 is about 4329.8896059830. The cubic root of 18747944 is about 265.6549316028.

It can be divided in two parts, 18747 and 944, that added together give a palindrome (19691).

The spelling of 18747944 in words is "eighteen million, seven hundred forty-seven thousand, nine hundred forty-four".