22118889 has 12 divisors (see below), whose sum is σ = 31935696. Its totient is φ = 13611312.

The previous prime is 22118867. The next prime is 22118891. The reversal of 22118889 is 98881122.

It is not a de Polignac number, because 22118889 - 2¹¹ = 22116841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (22118809) 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 11 ways as a sum of consecutive naturals, for example, 21307 + ... + 22320.

It is an arithmetic number, because the mean of its divisors is an integer number (2661308).

Almost surely, 2^22118889 is an apocalyptic number.

It is an amenable number.

22118889 is a deficient number, since it is larger than the sum of its proper divisors (9816807).

22118889 is a wasteful number, since it uses less digits than its factorization.

22118889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43656 (or 43643 counting only the distinct ones).

The product of its digits is 18432, while the sum is 39.

The square root of 22118889 is about 4703.0722937246. The cubic root of 22118889 is about 280.7077714942.

It can be divided in two parts, 221 and 18889, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 22118889 in words is "twenty-two million, one hundred eighteen thousand, eight hundred eighty-nine".