18344444 has 6 divisors (see below), whose sum is σ = 32102784. Its totient is φ = 9172220.

The previous prime is 18344423. The next prime is 18344453. The reversal of 18344444 is 44444381.

It is a self number, because there is not a number n which added to its sum of digits gives 18344444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2293052 + ... + 2293059.

It is an arithmetic number, because the mean of its divisors is an integer number (5350464).

Almost surely, 2^18344444 is an apocalyptic number.

It is an amenable number.

18344444 is a deficient number, since it is larger than the sum of its proper divisors (13758340).

18344444 is a wasteful number, since it uses less digits than its factorization.

18344444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586115 (or 4586113 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

The square root of 18344444 is about 4283.0414427133. The cubic root of 18344444 is about 263.7352526513.

The spelling of 18344444 in words is "eighteen million, three hundred forty-four thousand, four hundred forty-four".