21132330232 has 64 divisors (see below), whose sum is σ = 44099193600. Its totient is φ = 9427691520.

The previous prime is 21132330217. The next prime is 21132330283. The reversal of 21132330232 is 23203323112.

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 15 ways as a sum of consecutive naturals, for example, 3146494 + ... + 3153202.

It is an arithmetic number, because the mean of its divisors is an integer number (689049900).

Almost surely, 2^21132330232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21132330232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22049596800).

21132330232 is an abundant number, since it is smaller than the sum of its proper divisors (22966863368).

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

21132330232 is a wasteful number, since it uses less digits than its factorization.

21132330232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7736 (or 7732 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21132330232 its reverse (23203323112), we get a palindrome (44335653344).

The spelling of 21132330232 in words is "twenty-one billion, one hundred thirty-two million, three hundred thirty thousand, two hundred thirty-two".