22105818 has 32 divisors (see below), whose sum is σ = 56142720. Its totient is φ = 6315840.

The previous prime is 22105817. The next prime is 22105841. The reversal of 22105818 is 81850122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 22105791 and 22105800.

It is not an unprimeable number, because it can be changed into a prime (22105813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28863 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (1754460).

Almost surely, 2^22105818 is an apocalyptic number.

22105818 is an abundant number, since it is smaller than the sum of its proper divisors (34036902).

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

22105818 is a wasteful number, since it uses less digits than its factorization.

22105818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58499 (or 58493 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 22105818 is about 4701.6824648204. The cubic root of 22105818 is about 280.6524665123.

The spelling of 22105818 in words is "twenty-two million, one hundred five thousand, eight hundred eighteen".