18018529 has 2 divisors, whose sum is σ = 18018530. Its totient is φ = 18018528.

The previous prime is 18018503. The next prime is 18018551. The reversal of 18018529 is 92581081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 6012304 = 3465^2 + 2452^2 .

It is an emirp because it is prime and its reverse (92581081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18018529 - 2⁷ = 18018401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18018494 and 18018503.

It is not a weakly prime, because it can be changed into another prime (18018029) 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 as a sum of consecutive naturals, namely, 9009264 + 9009265.

It is an arithmetic number, because the mean of its divisors is an integer number (9009265).

Almost surely, 2^18018529 is an apocalyptic number.

It is an amenable number.

18018529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18018529 is an equidigital number, since it uses as much as digits as its factorization.

18018529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 18018529 is about 4244.8237890400. The cubic root of 18018529 is about 262.1640339848.

The spelling of 18018529 in words is "eighteen million, eighteen thousand, five hundred twenty-nine".