18144008 has 8 divisors (see below), whose sum is σ = 34020030. Its totient is φ = 9072000.

The previous prime is 18144001. The next prime is 18144011. The reversal of 18144008 is 80044181.

It can be written as a sum of positive squares in only one way, i.e., 17656804 + 487204 = 4202^2 + 698^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18144001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133993 + ... + 1134008.

Almost surely, 2^18144008 is an apocalyptic number.

It is an amenable number.

18144008 is a deficient number, since it is larger than the sum of its proper divisors (15876022).

18144008 is a wasteful number, since it uses less digits than its factorization.

18144008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268007 (or 2268003 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18144008 is about 4259.5783828919. The cubic root of 18144008 is about 262.7711870134.

Adding to 18144008 its reverse (80044181), we get a palindrome (98188189).

The spelling of 18144008 in words is "eighteen million, one hundred forty-four thousand, eight".