21443503210432 has 56 divisors (see below), whose sum is σ = 44799997562640. Its totient is φ = 10155528253440.

The previous prime is 21443503210429. The next prime is 21443503210499. The reversal of 21443503210432 is 23401230534412.

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 7 ways as a sum of consecutive naturals, for example, 4776582 + ... + 8105722.

Almost surely, 2^{21443503210432} is an apocalyptic number.

It is an amenable number.

21443503210432 is an abundant number, since it is smaller than the sum of its proper divisors (23356494352208).

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

21443503210432 is a wasteful number, since it uses less digits than its factorization.

21443503210432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334469 (or 3334459 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 21443503210432 its reverse (23401230534412), we get a palindrome (44844733744844).

The spelling of 21443503210432 in words is "twenty-one trillion, four hundred forty-three billion, five hundred three million, two hundred ten thousand, four hundred thirty-two".