18012017 has 2 divisors, whose sum is σ = 18012018. Its totient is φ = 18012016.

The previous prime is 18011977. The next prime is 18012041. The reversal of 18012017 is 71021081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9740641 + 8271376 = 3121^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 18012017 - 2⁸ = 18011761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18012017.

It is not a weakly prime, because it can be changed into another prime (18012047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006008 + 9006009.

It is an arithmetic number, because the mean of its divisors is an integer number (9006009).

Almost surely, 2^18012017 is an apocalyptic number.

It is an amenable number.

18012017 is a deficient number, since it is larger than the sum of its proper divisors (1).

18012017 is an equidigital number, since it uses as much as digits as its factorization.

18012017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 18012017 is about 4244.0566678592. The cubic root of 18012017 is about 262.1324476495.

Adding to 18012017 its reverse (71021081), we get a palindrome (89033098).

The spelling of 18012017 in words is "eighteen million, twelve thousand, seventeen".