22418 has 8 divisors (see below), whose sum is σ = 36720. Its totient is φ = 10180.

The previous prime is 22409. The next prime is 22433. The reversal of 22418 is 81422.

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

It is a plaindrome in base 7 and base 9.

It is a junction number, because it is equal to n+sod(n) for n = 22396 and 22405.

It is an unprimeable number.

22418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488 + ... + 531.

It is an arithmetic number, because the mean of its divisors is an integer number (4590).

2²²⁴¹⁸ is an apocalyptic number.

22418 is a deficient number, since it is larger than the sum of its proper divisors (14302).

22418 is a wasteful number, since it uses less digits than its factorization.

22418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032.

The product of its digits is 128, while the sum is 17.

The square root of 22418 is about 149.7264171748. The cubic root of 22418 is about 28.1967435839.

It can be divided in two parts, 224 and 18, that added together give a palindrome (242).

The spelling of 22418 in words is "twenty-two thousand, four hundred eighteen".