18222263 has 4 divisors (see below), whose sum is σ = 18327768. Its totient is φ = 18116760.

The previous prime is 18222257. The next prime is 18222271. The reversal of 18222263 is 36222281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18222263 - 2¹⁸ = 17960119 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 (18222223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52493 + ... + 52838.

It is an arithmetic number, because the mean of its divisors is an integer number (4581942).

Almost surely, 2^18222263 is an apocalyptic number.

18222263 is a deficient number, since it is larger than the sum of its proper divisors (105505).

18222263 is a wasteful number, since it uses less digits than its factorization.

18222263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105504.

The product of its digits is 2304, while the sum is 26.

The square root of 18222263 is about 4268.7542679334. The cubic root of 18222263 is about 263.1484220569.

The spelling of 18222263 in words is "eighteen million, two hundred twenty-two thousand, two hundred sixty-three".