22144444412 has 12 divisors (see below), whose sum is σ = 38890689936. Its totient is φ = 11032818720.

The previous prime is 22144444411. The next prime is 22144444447. The reversal of 22144444412 is 21444444122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144444411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9849608 + ... + 9851855.

It is an arithmetic number, because the mean of its divisors is an integer number (3240890828).

Almost surely, 2^22144444412 is an apocalyptic number.

It is an amenable number.

22144444412 is a deficient number, since it is larger than the sum of its proper divisors (16746245524).

22144444412 is a wasteful number, since it uses less digits than its factorization.

22144444412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19701748 (or 19701746 counting only the distinct ones).

The product of its digits is 32768, while the sum is 32.

Adding to 22144444412 its reverse (21444444122), we get a palindrome (43588888534).

It can be divided in two parts, 2 and 2144444412, that multiplied together give a palindrome (4288888824).

The spelling of 22144444412 in words is "twenty-two billion, one hundred forty-four million, four hundred forty-four thousand, four hundred twelve".