22818 has 8 divisors (see below), whose sum is σ = 45648. Its totient is φ = 7604.

The previous prime is 22817. The next prime is 22853. The reversal of 22818 is 81822.

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

22818 is an admirable number.

It is a super-2 number, since 2×22818² = 1041322248, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 7 and base 12.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 22794 and 22803.

It is not an unprimeable number, because it can be changed into a prime (22811) 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, 1896 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (5706).

2²²⁸¹⁸ is an apocalyptic number.

22818 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 (22824).

22818 is a wasteful number, since it uses less digits than its factorization.

22818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808.

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

The square root of 22818 is about 151.0562809022. The cubic root of 22818 is about 28.3634589224.

The spelling of 22818 in words is "twenty-two thousand, eight hundred eighteen".