21214421432 has 16 divisors (see below), whose sum is σ = 39778673400. Its totient is φ = 10606775200.

The previous prime is 21214421419. The next prime is 21214421441. The reversal of 21214421432 is 23412441212.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 258182 + ... + 330282.

Almost surely, 2^21214421432 is an apocalyptic number.

It is an amenable number.

21214421432 is a deficient number, since it is larger than the sum of its proper divisors (18564251968).

21214421432 is a wasteful number, since it uses less digits than its factorization.

21214421432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108886 (or 108882 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 21214421432 its reverse (23412441212), we get a palindrome (44626862644).

The spelling of 21214421432 in words is "twenty-one billion, two hundred fourteen million, four hundred twenty-one thousand, four hundred thirty-two".