21323010032 has 80 divisors (see below), whose sum is σ = 43638367680. Its totient is φ = 10089847040.

The previous prime is 21323010013. The next prime is 21323010043. The reversal of 21323010032 is 23001032312.

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, 20681357 + ... + 20682387.

It is an arithmetic number, because the mean of its divisors is an integer number (545479596).

Almost surely, 2^21323010032 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 21323010032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21819183840).

21323010032 is an abundant number, since it is smaller than the sum of its proper divisors (22315357648).

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

21323010032 is an equidigital number, since it uses as much as digits as its factorization.

21323010032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1115 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21323010032 its reverse (23001032312), we get a palindrome (44324042344).

The spelling of 21323010032 in words is "twenty-one billion, three hundred twenty-three million, ten thousand, thirty-two".