18822 has 8 divisors (see below), whose sum is σ = 37656. Its totient is φ = 6272.

The previous prime is 18803. The next prime is 18839. The reversal of 18822 is 22881.

It is a sphenic number, since it is the product of 3 distinct primes.

18822 is an admirable number.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563 + ... + 1574.

It is an arithmetic number, because the mean of its divisors is an integer number (4707).

2¹⁸⁸²² is an apocalyptic number.

18822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18828).

18822 is a wasteful number, since it uses less digits than its factorization.

18822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142.

The product of its digits is 256, while the sum is 21.

The square root of 18822 is about 137.1932942968. The cubic root of 18822 is about 26.6004258699.

It can be divided in two parts, 188 and 22, that added together give a triangular number (210 = T₂₀).

The spelling of 18822 in words is "eighteen thousand, eight hundred twenty-two".