18144005 has 8 divisors (see below), whose sum is σ = 23752224. Its totient is φ = 13195600.

The previous prime is 18144001. The next prime is 18144011. The reversal of 18144005 is 50044181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18144005 - 2² = 18144001 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 (18144001) 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 7 ways as a sum of consecutive naturals, for example, 164891 + ... + 165000.

It is an arithmetic number, because the mean of its divisors is an integer number (2969028).

Almost surely, 2^18144005 is an apocalyptic number.

It is an amenable number.

18144005 is a deficient number, since it is larger than the sum of its proper divisors (5608219).

18144005 is a wasteful number, since it uses less digits than its factorization.

18144005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329907.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 18144005 is about 4259.5780307444. The cubic root of 18144005 is about 262.7711725308.

Adding to 18144005 its reverse (50044181), we get a palindrome (68188186).

The spelling of 18144005 in words is "eighteen million, one hundred forty-four thousand, five".