18044329 has 2 divisors, whose sum is σ = 18044330. Its totient is φ = 18044328.

The previous prime is 18044321. The next prime is 18044353. The reversal of 18044329 is 92344081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16418704 + 1625625 = 4052^2 + 1275^2 .

It is an emirp because it is prime and its reverse (92344081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18044329 - 2³ = 18044321 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18044329.

It is not a weakly prime, because it can be changed into another prime (18044321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022164 + 9022165.

It is an arithmetic number, because the mean of its divisors is an integer number (9022165).

Almost surely, 2^18044329 is an apocalyptic number.

It is an amenable number.

18044329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044329 is an equidigital number, since it uses as much as digits as its factorization.

18044329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18044329 is about 4247.8616973720. The cubic root of 18044329 is about 262.2891016556.

The spelling of 18044329 in words is "eighteen million, forty-four thousand, three hundred twenty-nine".