21443232422 has 8 divisors (see below), whose sum is σ = 32228042400. Its totient is φ = 10700551624.

The previous prime is 21443232397. The next prime is 21443232443. The reversal of 21443232422 is 22423234412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 10531022 + ... + 10533057.

It is an arithmetic number, because the mean of its divisors is an integer number (4028505300).

Almost surely, 2^21443232422 is an apocalyptic number.

21443232422 is a deficient number, since it is larger than the sum of its proper divisors (10784809978).

21443232422 is a wasteful number, since it uses less digits than its factorization.

21443232422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21064590.

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

Adding to 21443232422 its reverse (22423234412), we get a palindrome (43866466834).

The spelling of 21443232422 in words is "twenty-one billion, four hundred forty-three million, two hundred thirty-two thousand, four hundred twenty-two".