22118664 has 16 divisors (see below), whose sum is σ = 55296720. Its totient is φ = 7372880.

The previous prime is 22118659. The next prime is 22118669. The reversal of 22118664 is 46681122.

It is an interprime number because it is at equal distance from previous prime (22118659) and next prime (22118669).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (22118669) by changing a digit.

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, 460782 + ... + 460829.

It is an arithmetic number, because the mean of its divisors is an integer number (3456045).

Almost surely, 2^22118664 is an apocalyptic number.

22118664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22118664 is an abundant number, since it is smaller than the sum of its proper divisors (33178056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22118664 is a wasteful number, since it uses less digits than its factorization.

22118664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921620 (or 921616 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 22118664 is about 4703.0483731299. The cubic root of 22118664 is about 280.7068196763.

Adding to 22118664 its reverse (46681122), we get a palindrome (68799786).

The spelling of 22118664 in words is "twenty-two million, one hundred eighteen thousand, six hundred sixty-four".