20321330232 has 64 divisors (see below), whose sum is σ = 58760513280. Its totient is φ = 5736137472.

The previous prime is 20321330219. The next prime is 20321330261. The reversal of 20321330232 is 23203312302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20321330199 and 20321330208.

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, 714733 + ... + 742620.

It is an arithmetic number, because the mean of its divisors is an integer number (918133020).

Almost surely, 2^20321330232 is an apocalyptic number.

It is an amenable number.

20321330232 is an abundant number, since it is smaller than the sum of its proper divisors (38439183048).

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

20321330232 is a wasteful number, since it uses less digits than its factorization.

20321330232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457452 (or 1457448 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20321330232 its reverse (23203312302), we get a palindrome (43524642534).

The spelling of 20321330232 in words is "twenty billion, three hundred twenty-one million, three hundred thirty thousand, two hundred thirty-two".