21032332032 has 72 divisors (see below), whose sum is σ = 56084776384. Its totient is φ = 6997238784.

The previous prime is 21032332019. The next prime is 21032332049. The reversal of 21032332032 is 23023323012.

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, 375483 + ... + 427845.

Almost surely, 2^21032332032 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 21032332032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28042388192).

21032332032 is an abundant number, since it is smaller than the sum of its proper divisors (35052444352).

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

21032332032 is an equidigital number, since it uses as much as digits as its factorization.

21032332032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52905 (or 52891 counting only the distinct ones).

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

Adding to 21032332032 its reverse (23023323012), we get a palindrome (44055655044).

The spelling of 21032332032 in words is "twenty-one billion, thirty-two million, three hundred thirty-two thousand, thirty-two".