18427223 has 2 divisors, whose sum is σ = 18427224. Its totient is φ = 18427222.

The previous prime is 18427193. The next prime is 18427259. The reversal of 18427223 is 32272481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18427223 - 2¹⁶ = 18361687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18427523) 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, 9213611 + 9213612.

It is an arithmetic number, because the mean of its divisors is an integer number (9213612).

Almost surely, 2^18427223 is an apocalyptic number.

18427223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18427223 is an equidigital number, since it uses as much as digits as its factorization.

18427223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 18427223 is about 4292.6941423773. The cubic root of 18427223 is about 264.1313577627.

The spelling of 18427223 in words is "eighteen million, four hundred twenty-seven thousand, two hundred twenty-three".