22012431320 has 48 divisors (see below), whose sum is σ = 54439847280. Its totient is φ = 8004518720.

The previous prime is 22012431307. The next prime is 22012431347. The reversal of 22012431320 is 2313421022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22012431292 and 22012431301.

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, 2269172 + ... + 2278851.

It is an arithmetic number, because the mean of its divisors is an integer number (1134163485).

Almost surely, 2^22012431320 is an apocalyptic number.

22012431320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012431320 is an abundant number, since it is smaller than the sum of its proper divisors (32427415960).

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

22012431320 is a wasteful number, since it uses less digits than its factorization.

22012431320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4548056 (or 4548041 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22012431320 its reverse (2313421022), we get a palindrome (24325852342).

The spelling of 22012431320 in words is "twenty-two billion, twelve million, four hundred thirty-one thousand, three hundred twenty".