21332032320 has 112 divisors (see below), whose sum is σ = 67762526400. Its totient is φ = 5685743616.

The previous prime is 21332032301. The next prime is 21332032331. The reversal of 21332032320 is 2323023312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2586924 + ... + 2595156.

Almost surely, 2^21332032320 is an apocalyptic number.

21332032320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21332032320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33881263200).

21332032320 is an abundant number, since it is smaller than the sum of its proper divisors (46430494080).

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

21332032320 is a wasteful number, since it uses less digits than its factorization.

21332032320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10952 (or 10942 counting only the distinct ones).

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

Adding to 21332032320 its reverse (2323023312), we get a palindrome (23655055632).

The spelling of 21332032320 in words is "twenty-one billion, three hundred thirty-two million, thirty-two thousand, three hundred twenty".