21332224432 has 40 divisors (see below), whose sum is σ = 42709087872. Its totient is φ = 10311244800.

The previous prime is 21332224423. The next prime is 21332224447. The reversal of 21332224432 is 23442223312.

It is a self number, because there is not a number n which added to its sum of digits gives 21332224432.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462582 + ... + 506602.

Almost surely, 2^21332224432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21332224432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21354543936).

21332224432 is an abundant number, since it is smaller than the sum of its proper divisors (21376863440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21332224432 is a wasteful number, since it uses less digits than its factorization.

21332224432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45037 (or 45031 counting only the distinct ones).

The product of its digits is 13824, while the sum is 28.

Adding to 21332224432 its reverse (23442223312), we get a palindrome (44774447744).

The spelling of 21332224432 in words is "twenty-one billion, three hundred thirty-two million, two hundred twenty-four thousand, four hundred thirty-two".