18026213 has 2 divisors, whose sum is σ = 18026214. Its totient is φ = 18026212.

The previous prime is 18026179. The next prime is 18026219. The reversal of 18026213 is 31262081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14760964 + 3265249 = 3842^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 18026213 - 2¹⁴ = 18009829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18026219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013106 + 9013107.

It is an arithmetic number, because the mean of its divisors is an integer number (9013107).

Almost surely, 2^18026213 is an apocalyptic number.

It is an amenable number.

18026213 is a deficient number, since it is larger than the sum of its proper divisors (1).

18026213 is an equidigital number, since it uses as much as digits as its factorization.

18026213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18026213 is about 4245.7287949185. The cubic root of 18026213 is about 262.2012952979.

Adding to 18026213 its reverse (31262081), we get a palindrome (49288294).

The spelling of 18026213 in words is "eighteen million, twenty-six thousand, two hundred thirteen".