22180018 has 16 divisors (see below), whose sum is σ = 38268864. Its totient is φ = 9444240.

The previous prime is 22180013. The next prime is 22180031. The reversal of 22180018 is 81008122.

It is not an unprimeable number, because it can be changed into a prime (22180013) 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 in 7 ways as a sum of consecutive naturals, for example, 2848 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (2391804).

Almost surely, 2^22180018 is an apocalyptic number.

22180018 is a deficient number, since it is larger than the sum of its proper divisors (16088846).

22180018 is a wasteful number, since it uses less digits than its factorization.

22180018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10257.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 22180018 is about 4709.5666467309. The cubic root of 22180018 is about 280.9661268761.

The spelling of 22180018 in words is "twenty-two million, one hundred eighty thousand, eighteen".