18263 has 4 divisors (see below), whose sum is σ = 20880. Its totient is φ = 15648.

The previous prime is 18257. The next prime is 18269. The reversal of 18263 is 36281.

18263 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (18257) and next prime (18269).

It is a cyclic number.

It is not a de Polignac number, because 18263 - 2⁶ = 18199 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 (18269) 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, 1298 + ... + 1311.

It is an arithmetic number, because the mean of its divisors is an integer number (5220).

2¹⁸²⁶³ is an apocalyptic number.

18263 is a deficient number, since it is larger than the sum of its proper divisors (2617).

18263 is an equidigital number, since it uses as much as digits as its factorization.

18263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its digits is 288, while the sum is 20.

The square root of 18263 is about 135.1406674543. The cubic root of 18263 is about 26.3344370988.

The spelling of 18263 in words is "eighteen thousand, two hundred sixty-three".