18342223 has 2 divisors, whose sum is σ = 18342224. Its totient is φ = 18342222.

The previous prime is 18342217. The next prime is 18342251. The reversal of 18342223 is 32224381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18342223 - 2⁹ = 18341711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18342263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9171111 + 9171112.

It is an arithmetic number, because the mean of its divisors is an integer number (9171112).

Almost surely, 2^18342223 is an apocalyptic number.

18342223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18342223 is an equidigital number, since it uses as much as digits as its factorization.

18342223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

The square root of 18342223 is about 4282.7821564959. The cubic root of 18342223 is about 263.7246085632.

The spelling of 18342223 in words is "eighteen million, three hundred forty-two thousand, two hundred twenty-three".