18443416 has 16 divisors (see below), whose sum is σ = 34660800. Its totient is φ = 9200544.

The previous prime is 18443413. The next prime is 18443423. The reversal of 18443416 is 61434481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18443413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426 + ... + 6238.

It is an arithmetic number, because the mean of its divisors is an integer number (2166300).

Almost surely, 2^18443416 is an apocalyptic number.

It is an amenable number.

18443416 is a deficient number, since it is larger than the sum of its proper divisors (16217384).

18443416 is a wasteful number, since it uses less digits than its factorization.

18443416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298 (or 5294 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 18443416 is about 4294.5798397515. The cubic root of 18443416 is about 264.2087039595.

Adding to 18443416 its reverse (61434481), we get a palindrome (79877897).

The spelling of 18443416 in words is "eighteen million, four hundred forty-three thousand, four hundred sixteen".