18116444 has 12 divisors (see below), whose sum is σ = 31828944. Its totient is φ = 9022464.

The previous prime is 18116401. The next prime is 18116447. The reversal of 18116444 is 44461181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18116447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7784 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (2652412).

Almost surely, 2^18116444 is an apocalyptic number.

It is an amenable number.

18116444 is a deficient number, since it is larger than the sum of its proper divisors (13712500).

18116444 is a wasteful number, since it uses less digits than its factorization.

18116444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17884 (or 17882 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 18116444 is about 4256.3416216277. The cubic root of 18116444 is about 262.6380540636.

The spelling of 18116444 in words is "eighteen million, one hundred sixteen thousand, four hundred forty-four".