18022513 has 2 divisors, whose sum is σ = 18022514. Its totient is φ = 18022512.

The previous prime is 18022489. The next prime is 18022517. The reversal of 18022513 is 31522081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15626209 + 2396304 = 3953^2 + 1548^2 .

It is a cyclic number.

It is not a de Polignac number, because 18022513 - 2⁵ = 18022481 is a prime.

It is not a weakly prime, because it can be changed into another prime (18022517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9011256 + 9011257.

It is an arithmetic number, because the mean of its divisors is an integer number (9011257).

Almost surely, 2^18022513 is an apocalyptic number.

It is an amenable number.

18022513 is a deficient number, since it is larger than the sum of its proper divisors (1).

18022513 is an equidigital number, since it uses as much as digits as its factorization.

18022513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18022513 is about 4245.2930405332. The cubic root of 18022513 is about 262.1833545510.

Adding to 18022513 its reverse (31522081), we get a palindrome (49544594).

The spelling of 18022513 in words is "eighteen million, twenty-two thousand, five hundred thirteen".