21320324322 has 16 divisors (see below), whose sum is σ = 46517071392. Its totient is φ = 6460704320.

The previous prime is 21320324299. The next prime is 21320324339. The reversal of 21320324322 is 22342302312.

It is a junction number, because it is equal to n+sod(n) for n = 21320324292 and 21320324301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161517543 + ... + 161517674.

It is an arithmetic number, because the mean of its divisors is an integer number (2907316962).

Almost surely, 2^21320324322 is an apocalyptic number.

21320324322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21320324322 is an abundant number, since it is smaller than the sum of its proper divisors (25196747070).

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

21320324322 is a wasteful number, since it uses less digits than its factorization.

21320324322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323035233.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21320324322 its reverse (22342302312), we get a palindrome (43662626634).

The spelling of 21320324322 in words is "twenty-one billion, three hundred twenty million, three hundred twenty-four thousand, three hundred twenty-two".