21232142432 has 48 divisors (see below), whose sum is σ = 42484547952. Its totient is φ = 10443763200.

The previous prime is 21232142387. The next prime is 21232142441. The reversal of 21232142432 is 23424123212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486503 + ... + 528345.

It is an arithmetic number, because the mean of its divisors is an integer number (885094749).

Almost surely, 2^21232142432 is an apocalyptic number.

It is an amenable number.

21232142432 is an abundant number, since it is smaller than the sum of its proper divisors (21252405520).

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

21232142432 is a wasteful number, since it uses less digits than its factorization.

21232142432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42111 (or 42103 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

Adding to 21232142432 its reverse (23424123212), we get a palindrome (44656265644).

The spelling of 21232142432 in words is "twenty-one billion, two hundred thirty-two million, one hundred forty-two thousand, four hundred thirty-two".