18363 has 4 divisors (see below), whose sum is σ = 24488. Its totient is φ = 12240.

The previous prime is 18353. The next prime is 18367. The reversal of 18363 is 36381.

18363 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 not a de Polignac number, because 18363 - 2⁹ = 17851 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 14 and base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18367) 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, 3058 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (6122).

2¹⁸³⁶³ is an apocalyptic number.

18363 is a deficient number, since it is larger than the sum of its proper divisors (6125).

18363 is an equidigital number, since it uses as much as digits as its factorization.

18363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6124.

The product of its digits is 432, while the sum is 21.

The square root of 18363 is about 135.5101472215. The cubic root of 18363 is about 26.3824148271.

The spelling of 18363 in words is "eighteen thousand, three hundred sixty-three".