21144324422 has 32 divisors (see below), whose sum is σ = 34534491264. Its totient is φ = 9650995200.

The previous prime is 21144324403. The next prime is 21144324437. The reversal of 21144324422 is 22442344112.

It is a happy number.

21144324422 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4716422 + ... + 4720902.

It is an arithmetic number, because the mean of its divisors is an integer number (1079202852).

Almost surely, 2^21144324422 is an apocalyptic number.

21144324422 is a deficient number, since it is larger than the sum of its proper divisors (13390166842).

21144324422 is a wasteful number, since it uses less digits than its factorization.

21144324422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464.

The product of its digits is 12288, while the sum is 29.

Adding to 21144324422 its reverse (22442344112), we get a palindrome (43586668534).

The spelling of 21144324422 in words is "twenty-one billion, one hundred forty-four million, three hundred twenty-four thousand, four hundred twenty-two".