18044311 has 4 divisors (see below), whose sum is σ = 18272800. Its totient is φ = 17815824.

The previous prime is 18044309. The next prime is 18044317. The reversal of 18044311 is 11344081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18044311 - 2¹ = 18044309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18044317) 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, 114126 + ... + 114283.

It is an arithmetic number, because the mean of its divisors is an integer number (4568200).

Almost surely, 2^18044311 is an apocalyptic number.

18044311 is a deficient number, since it is larger than the sum of its proper divisors (228489).

18044311 is an equidigital number, since it uses as much as digits as its factorization.

18044311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228488.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18044311 is about 4247.8595786584. The cubic root of 18044311 is about 262.2890144407.

Adding to 18044311 its reverse (11344081), we get a palindrome (29388392).

The spelling of 18044311 in words is "eighteen million, forty-four thousand, three hundred eleven".