21232112432 has 40 divisors (see below), whose sum is σ = 42571129440. Its totient is φ = 10246279680.

The previous prime is 21232112401. The next prime is 21232112453. The reversal of 21232112432 is 23421123212.

It is a junction number, because it is equal to n+sod(n) for n = 21232112398 and 21232112407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1622588 + ... + 1635620.

It is an arithmetic number, because the mean of its divisors is an integer number (1064278236).

Almost surely, 2^21232112432 is an apocalyptic number.

It is an amenable number.

21232112432 is an abundant number, since it is smaller than the sum of its proper divisors (21339017008).

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

21232112432 is a wasteful number, since it uses less digits than its factorization.

21232112432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16581 (or 16575 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 21232112432 its reverse (23421123212), we get a palindrome (44653235644).

The spelling of 21232112432 in words is "twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, four hundred thirty-two".