18144001 has 2 divisors, whose sum is σ = 18144002. Its totient is φ = 18144000.

The previous prime is 18143989. The next prime is 18144011. The reversal of 18144001 is 10044181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18054001 + 90000 = 4249^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 18144001 - 2⁵ = 18143969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18144001.

It is not a weakly prime, because it can be changed into another prime (18144011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072000 + 9072001.

It is an arithmetic number, because the mean of its divisors is an integer number (9072001).

Almost surely, 2^18144001 is an apocalyptic number.

It is an amenable number.

18144001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18144001 is an equidigital number, since it uses as much as digits as its factorization.

18144001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 18144001 is about 4259.5775612143. The cubic root of 18144001 is about 262.7711532208.

Adding to 18144001 its reverse (10044181), we get a palindrome (28188182).

The spelling of 18144001 in words is "eighteen million, one hundred forty-four thousand, one".