22144423220 has 12 divisors (see below), whose sum is σ = 46503288804. Its totient is φ = 8857769280.

The previous prime is 22144423123. The next prime is 22144423237. The reversal of 22144423220 is 2232444122.

It can be written as a sum of positive squares in 2 ways, for example, as 13851406864 + 8293016356 = 117692^2 + 91066^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22144423220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553610561 + ... + 553610600.

It is an arithmetic number, because the mean of its divisors is an integer number (3875274067).

Almost surely, 2^22144423220 is an apocalyptic number.

22144423220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22144423220 is an abundant number, since it is smaller than the sum of its proper divisors (24358865584).

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

22144423220 is a wasteful number, since it uses less digits than its factorization.

22144423220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107221170 (or 1107221168 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 22144423220 its reverse (2232444122), we get a palindrome (24376867342).

The spelling of 22144423220 in words is "twenty-two billion, one hundred forty-four million, four hundred twenty-three thousand, two hundred twenty".