22181828 has 12 divisors (see below), whose sum is σ = 38922240. Its totient is φ = 11061192.

The previous prime is 22181813. The next prime is 22181879. The reversal of 22181828 is 82818122.

It is a junction number, because it is equal to n+sod(n) for n = 22181794 and 22181803.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5708 + ... + 8771.

It is an arithmetic number, because the mean of its divisors is an integer number (3243520).

Almost surely, 2^22181828 is an apocalyptic number.

It is an amenable number.

22181828 is a deficient number, since it is larger than the sum of its proper divisors (16740412).

22181828 is a wasteful number, since it uses less digits than its factorization.

22181828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14866 (or 14864 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 22181828 is about 4709.7588048646. The cubic root of 22181828 is about 280.9737694136.

It can be divided in two parts, 2218 and 1828, that multiplied together give a palindrome (4054504).

The spelling of 22181828 in words is "twenty-two million, one hundred eighty-one thousand, eight hundred twenty-eight".