21322330320 has 80 divisors (see below), whose sum is σ = 68973121152. Its totient is φ = 5438737920.

The previous prime is 21322330303. The next prime is 21322330349. The reversal of 21322330320 is 2303322312.

It is a tau number, because it is divible by the number of its divisors (80).

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, 1925851 + ... + 1936890.

Almost surely, 2^21322330320 is an apocalyptic number.

21322330320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322330320 is an abundant number, since it is smaller than the sum of its proper divisors (47650790832).

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

21322330320 is a wasteful number, since it uses less digits than its factorization.

21322330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862780 (or 3862774 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21322330320 its reverse (2303322312), we get a palindrome (23625652632).

The spelling of 21322330320 in words is "twenty-one billion, three hundred twenty-two million, three hundred thirty thousand, three hundred twenty".