22031423444 has 6 divisors (see below), whose sum is σ = 38554991034. Its totient is φ = 11015711720.

The previous prime is 22031423443. The next prime is 22031423503. The reversal of 22031423444 is 44432413022.

It can be written as a sum of positive squares in only one way, i.e., 21321840400 + 709583044 = 146020^2 + 26638^2 .

It is a super-2 number, since 2×22031423444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031423443) by changing a digit.

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 as a sum of consecutive naturals, namely, 2753927927 + ... + 2753927934.

It is an arithmetic number, because the mean of its divisors is an integer number (6425831839).

Almost surely, 2^22031423444 is an apocalyptic number.

It is an amenable number.

22031423444 is a deficient number, since it is larger than the sum of its proper divisors (16523567590).

22031423444 is a wasteful number, since it uses less digits than its factorization.

22031423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507855865 (or 5507855863 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 22031423444 its reverse (44432413022), we get a palindrome (66463836466).

The spelling of 22031423444 in words is "twenty-two billion, thirty-one million, four hundred twenty-three thousand, four hundred forty-four".