18443018 has 16 divisors (see below), whose sum is σ = 30460320. Its totient is φ = 8305200.

The previous prime is 18443003. The next prime is 18443059. The reversal of 18443018 is 81034481.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1448 + ... + 6243.

It is an arithmetic number, because the mean of its divisors is an integer number (1903770).

Almost surely, 2^18443018 is an apocalyptic number.

18443018 is a deficient number, since it is larger than the sum of its proper divisors (12017302).

18443018 is a wasteful number, since it uses less digits than its factorization.

18443018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7813.

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

The square root of 18443018 is about 4294.5335020232. The cubic root of 18443018 is about 264.2068034472.

Adding to 18443018 its reverse (81034481), we get a palindrome (99477499).

The spelling of 18443018 in words is "eighteen million, four hundred forty-three thousand, eighteen".