20312123320 has 32 divisors (see below), whose sum is σ = 45706461120. Its totient is φ = 8124105600.

The previous prime is 20312123317. The next prime is 20312123357. The reversal of 20312123320 is 2332121302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687574 + ... + 716506.

It is an arithmetic number, because the mean of its divisors is an integer number (1428326910).

Almost surely, 2^20312123320 is an apocalyptic number.

20312123320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312123320 is an abundant number, since it is smaller than the sum of its proper divisors (25394337800).

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

20312123320 is a wasteful number, since it uses less digits than its factorization.

20312123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46495 (or 46491 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20312123320 its reverse (2332121302), we get a palindrome (22644244622).

The spelling of 20312123320 in words is "twenty billion, three hundred twelve million, one hundred twenty-three thousand, three hundred twenty".