21324113232 has 80 divisors (see below), whose sum is σ = 56200063680. Its totient is φ = 6965226496.

The previous prime is 21324113207. The next prime is 21324113263. The reversal of 21324113232 is 23231142312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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, 885868 + ... + 909620.

It is an arithmetic number, because the mean of its divisors is an integer number (702500796).

Almost surely, 2^21324113232 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 21324113232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28100031840).

21324113232 is an abundant number, since it is smaller than the sum of its proper divisors (34875950448).

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

21324113232 is a wasteful number, since it uses less digits than its factorization.

21324113232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24140 (or 24134 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 21324113232 its reverse (23231142312), we get a palindrome (44555255544).

The spelling of 21324113232 in words is "twenty-one billion, three hundred twenty-four million, one hundred thirteen thousand, two hundred thirty-two".