18533089 has 2 divisors, whose sum is σ = 18533090. Its totient is φ = 18533088.

The previous prime is 18533083. The next prime is 18533143. The reversal of 18533089 is 98033581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18533025 + 64 = 4305^2 + 8^2 .

It is an emirp because it is prime and its reverse (98033581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18533089 - 2¹¹ = 18531041 is a prime.

It is not a weakly prime, because it can be changed into another prime (18533083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9266544 + 9266545.

It is an arithmetic number, because the mean of its divisors is an integer number (9266545).

Almost surely, 2^18533089 is an apocalyptic number.

It is an amenable number.

18533089 is a deficient number, since it is larger than the sum of its proper divisors (1).

18533089 is an equidigital number, since it uses as much as digits as its factorization.

18533089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 18533089 is about 4305.0074332108. The cubic root of 18533089 is about 264.6362113974.

The spelling of 18533089 in words is "eighteen million, five hundred thirty-three thousand, eighty-nine".