22718 has 8 divisors (see below), whose sum is σ = 35112. Its totient is φ = 11016.

The previous prime is 22717. The next prime is 22721. The reversal of 22718 is 81722.

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

It is a super-2 number, since 2×22718² = 1032215048, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 22718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22717) 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, 80 + ... + 227.

It is an arithmetic number, because the mean of its divisors is an integer number (4389).

2²²⁷¹⁸ is an apocalyptic number.

22718 is a deficient number, since it is larger than the sum of its proper divisors (12394).

22718 is a wasteful number, since it uses less digits than its factorization.

22718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its digits is 224, while the sum is 20.

The square root of 22718 is about 150.7249149942. The cubic root of 22718 is about 28.3219639120.

The spelling of 22718 in words is "twenty-two thousand, seven hundred eighteen".