21343311232 has 96 divisors (see below), whose sum is σ = 45479201040. Its totient is φ = 9974784000.

The previous prime is 21343311191. The next prime is 21343311251. The reversal of 21343311232 is 23211334312.

It is a junction number, because it is equal to n+sod(n) for n = 21343311197 and 21343311206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5583882 + ... + 5587702.

Almost surely, 2^21343311232 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 21343311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22739600520).

21343311232 is an abundant number, since it is smaller than the sum of its proper divisors (24135889808).

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

21343311232 is a wasteful number, since it uses less digits than its factorization.

21343311232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 3991 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 21343311232 its reverse (23211334312), we get a palindrome (44554645544).

The spelling of 21343311232 in words is "twenty-one billion, three hundred forty-three million, three hundred eleven thousand, two hundred thirty-two".