22180118 has 4 divisors (see below), whose sum is σ = 33270180. Its totient is φ = 11090058.

The previous prime is 22180111. The next prime is 22180141. The reversal of 22180118 is 81108122.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 22180093 and 22180102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545028 + ... + 5545031.

It is an arithmetic number, because the mean of its divisors is an integer number (8317545).

Almost surely, 2^22180118 is an apocalyptic number.

22180118 is a deficient number, since it is larger than the sum of its proper divisors (11090062).

22180118 is a wasteful number, since it uses less digits than its factorization.

22180118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090061.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 22180118 is about 4709.5772634070. The cubic root of 22180118 is about 280.9665491266.

The spelling of 22180118 in words is "twenty-two million, one hundred eighty thousand, one hundred eighteen".