18144339 has 4 divisors (see below), whose sum is σ = 24192456. Its totient is φ = 12096224.

The previous prime is 18144317. The next prime is 18144353. The reversal of 18144339 is 93344181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18144339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18164339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3024054 + ... + 3024059.

It is an arithmetic number, because the mean of its divisors is an integer number (6048114).

Almost surely, 2^18144339 is an apocalyptic number.

18144339 is a deficient number, since it is larger than the sum of its proper divisors (6048117).

18144339 is an equidigital number, since it uses as much as digits as its factorization.

18144339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048116.

The product of its digits is 10368, while the sum is 33.

The square root of 18144339 is about 4259.6172363253. The cubic root of 18144339 is about 262.7727849097.

The spelling of 18144339 in words is "eighteen million, one hundred forty-four thousand, three hundred thirty-nine".