18099223 has 2 divisors, whose sum is σ = 18099224. Its totient is φ = 18099222.

The previous prime is 18099217. The next prime is 18099241. The reversal of 18099223 is 32299081.

It is a weak prime.

It is an emirp because it is prime and its reverse (32299081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18099223 - 2¹⁷ = 17968151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18099283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9049611 + 9049612.

It is an arithmetic number, because the mean of its divisors is an integer number (9049612).

Almost surely, 2^18099223 is an apocalyptic number.

18099223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18099223 is an equidigital number, since it uses as much as digits as its factorization.

18099223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18099223 is about 4254.3181592354. The cubic root of 18099223 is about 262.5548088124.

The spelling of 18099223 in words is "eighteen million, ninety-nine thousand, two hundred twenty-three".