22212340424 has 8 divisors (see below), whose sum is σ = 41648138310. Its totient is φ = 11106170208.

The previous prime is 22212340391. The next prime is 22212340427. The reversal of 22212340424 is 42404321222.

It can be written as a sum of positive squares in only one way, i.e., 21412468900 + 799871524 = 146330^2 + 28282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×22212340424² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22212340393 and 22212340402.

It is not an unprimeable number, because it can be changed into a prime (22212340427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388271269 + ... + 1388271284.

Almost surely, 2^22212340424 is an apocalyptic number.

It is an amenable number.

22212340424 is a deficient number, since it is larger than the sum of its proper divisors (19435797886).

22212340424 is a wasteful number, since it uses less digits than its factorization.

22212340424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776542559 (or 2776542555 counting only the distinct ones).

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

Adding to 22212340424 its reverse (42404321222), we get a palindrome (64616661646).

The spelling of 22212340424 in words is "twenty-two billion, two hundred twelve million, three hundred forty thousand, four hundred twenty-four".