22131320312304 has 480 divisors, whose sum is σ = 76726458192384. Its totient is φ = 5810260377600.

The previous prime is 22131320312293. The next prime is 22131320312359. The reversal of 22131320312304 is 40321302313122.

22131320312304 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 1 + 320 + 31 + 2 + 304 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2063905887 + ... + 2063916609.

Almost surely, 2^{22131320312304} is an apocalyptic number.

22131320312304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22131320312304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38363229096192).

22131320312304 is an abundant number, since it is smaller than the sum of its proper divisors (54595137880080).

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

22131320312304 is a wasteful number, since it uses less digits than its factorization.

22131320312304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605 (or 13596 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 22131320312304 its reverse (40321302313122), we get a palindrome (62452622625426).

The spelling of 22131320312304 in words is "twenty-two trillion, one hundred thirty-one billion, three hundred twenty million, three hundred twelve thousand, three hundred four".