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22118 has 4 divisors (see below), whose sum is σ = 33180. Its totient is φ = 11058.

The previous prime is 22111. The next prime is 22123. The reversal of 22118 is 81122.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 11 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111) by changing a digit.

22118 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 as a sum of consecutive naturals, namely, 5528 + ... + 5531.

It is an arithmetic number, because the mean of its divisors is an integer number (8295).

222118 is an apocalyptic number.

22118 is a deficient number, since it is larger than the sum of its proper divisors (11062).

22118 is a wasteful number, since it uses less digits than its factorization.

22118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061.

The product of its digits is 32, while the sum is 14.

The square root of 22118 is about 148.7212157024. The cubic root of 22118 is about 28.0704010718.

The spelling of 22118 in words is "twenty-two thousand, one hundred eighteen".

Divisors: 1 2 11059 22118