21732766332 has 96 divisors (see below), whose sum is σ = 53737420800. Its totient is φ = 6822047232.

The previous prime is 21732766327. The next prime is 21732766339. The reversal of 21732766332 is 23366723712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21732766339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8916618 + ... + 8919054.

It is an arithmetic number, because the mean of its divisors is an integer number (559764800).

Almost surely, 2^21732766332 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 21732766332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26868710400).

21732766332 is an abundant number, since it is smaller than the sum of its proper divisors (32004654468).

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

21732766332 is a wasteful number, since it uses less digits than its factorization.

21732766332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955 (or 2953 counting only the distinct ones).

The product of its digits is 381024, while the sum is 42.

The spelling of 21732766332 in words is "twenty-one billion, seven hundred thirty-two million, seven hundred sixty-six thousand, three hundred thirty-two".