22918 has 8 divisors (see below), whose sum is σ = 39312. Its totient is φ = 9816.

The previous prime is 22907. The next prime is 22921. The reversal of 22918 is 81922.

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

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805 + ... + 832.

It is an arithmetic number, because the mean of its divisors is an integer number (4914).

2²²⁹¹⁸ is an apocalyptic number.

22918 is a deficient number, since it is larger than the sum of its proper divisors (16394).

22918 is a wasteful number, since it uses less digits than its factorization.

22918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its digits is 288, while the sum is 22.

The square root of 22918 is about 151.3869214959. The cubic root of 22918 is about 28.4048328746.

The spelling of 22918 in words is "twenty-two thousand, nine hundred eighteen".