18422263 has 4 divisors (see below), whose sum is σ = 18920200. Its totient is φ = 17924328.

The previous prime is 18422249. The next prime is 18422269. The reversal of 18422263 is 36222481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36222481 = 311 ⋅116471.

It is a cyclic number.

It is not a de Polignac number, because 18422263 - 2⁵ = 18422231 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 (18422269) 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, 248913 + ... + 248986.

It is an arithmetic number, because the mean of its divisors is an integer number (4730050).

Almost surely, 2^18422263 is an apocalyptic number.

18422263 is a deficient number, since it is larger than the sum of its proper divisors (497937).

18422263 is an equidigital number, since it uses as much as digits as its factorization.

18422263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497936.

The product of its digits is 4608, while the sum is 28.

The square root of 18422263 is about 4292.1163777326. The cubic root of 18422263 is about 264.1076571559.

The spelling of 18422263 in words is "eighteen million, four hundred twenty-two thousand, two hundred sixty-three".