21534113432 has 32 divisors (see below), whose sum is σ = 43488446400. Its totient is φ = 9937426944.

The previous prime is 21534113417. The next prime is 21534113437. The reversal of 21534113432 is 23431143512.

It is a junction number, because it is equal to n+sod(n) for n = 21534113395 and 21534113404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534113437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294544 + ... + 1311072.

It is an arithmetic number, because the mean of its divisors is an integer number (1359013950).

Almost surely, 2^21534113432 is an apocalyptic number.

It is an amenable number.

21534113432 is an abundant number, since it is smaller than the sum of its proper divisors (21954332968).

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

21534113432 is a wasteful number, since it uses less digits than its factorization.

21534113432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29075 (or 29071 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

Adding to 21534113432 its reverse (23431143512), we get a palindrome (44965256944).

The spelling of 21534113432 in words is "twenty-one billion, five hundred thirty-four million, one hundred thirteen thousand, four hundred thirty-two".