18252223 has 12 divisors (see below), whose sum is σ = 20632248. Its totient is φ = 16012640.

The previous prime is 18252197. The next prime is 18252277. The reversal of 18252223 is 32225281.

It is not a de Polignac number, because 18252223 - 2¹⁷ = 18121151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18252023) 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 in 11 ways as a sum of consecutive naturals, for example, 8265 + ... + 10237.

It is an arithmetic number, because the mean of its divisors is an integer number (1719354).

Almost surely, 2^18252223 is an apocalyptic number.

18252223 is a deficient number, since it is larger than the sum of its proper divisors (2380025).

18252223 is a wasteful number, since it uses less digits than its factorization.

18252223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 2013 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 18252223 is about 4272.2620472064. The cubic root of 18252223 is about 263.2925609399.

The spelling of 18252223 in words is "eighteen million, two hundred fifty-two thousand, two hundred twenty-three".