21313322232 has 64 divisors (see below), whose sum is σ = 57102727680. Its totient is φ = 6611882112.

The previous prime is 21313322203. The next prime is 21313322237. The reversal of 21313322232 is 23222331312.

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 not an unprimeable number, because it can be changed into a prime (21313322237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501348 + ... + 542195.

It is an arithmetic number, because the mean of its divisors is an integer number (892230120).

Almost surely, 2^21313322232 is an apocalyptic number.

It is an amenable number.

21313322232 is an abundant number, since it is smaller than the sum of its proper divisors (35789405448).

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

21313322232 is a wasteful number, since it uses less digits than its factorization.

21313322232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043612 (or 1043608 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

Adding to 21313322232 its reverse (23222331312), we get a palindrome (44535653544).

The spelling of 21313322232 in words is "twenty-one billion, three hundred thirteen million, three hundred twenty-two thousand, two hundred thirty-two".