18169133 has 2 divisors, whose sum is σ = 18169134. Its totient is φ = 18169132.

The previous prime is 18169117. The next prime is 18169147. The reversal of 18169133 is 33196181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18164644 + 4489 = 4262^2 + 67^2 .

It is an emirp because it is prime and its reverse (33196181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18169133 - 2⁴ = 18169117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18169133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18169633) 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, 9084566 + 9084567.

It is an arithmetic number, because the mean of its divisors is an integer number (9084567).

Almost surely, 2^18169133 is an apocalyptic number.

It is an amenable number.

18169133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18169133 is an equidigital number, since it uses as much as digits as its factorization.

18169133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 18169133 is about 4262.5265981575. The cubic root of 18169133 is about 262.8924222806.

The spelling of 18169133 in words is "eighteen million, one hundred sixty-nine thousand, one hundred thirty-three".