22123412 has 6 divisors (see below), whose sum is σ = 38715978. Its totient is φ = 11061704.

The previous prime is 22123399. The next prime is 22123421. The reversal of 22123412 is 21432122.

It can be written as a sum of positive squares in only one way, i.e., 13278736 + 8844676 = 3644^2 + 2974^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765423 + ... + 2765430.

It is an arithmetic number, because the mean of its divisors is an integer number (6452663).

Almost surely, 2^22123412 is an apocalyptic number.

It is an amenable number.

22123412 is a deficient number, since it is larger than the sum of its proper divisors (16592566).

22123412 is a wasteful number, since it uses less digits than its factorization.

22123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530857 (or 5530855 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 22123412 is about 4703.5531250322. The cubic root of 22123412 is about 280.7269037800.

Adding to 22123412 its reverse (21432122), we get a palindrome (43555534).

The spelling of 22123412 in words is "twenty-two million, one hundred twenty-three thousand, four hundred twelve".