20331321312 has 48 divisors (see below), whose sum is σ = 53723198592. Its totient is φ = 6732220800.

The previous prime is 20331321299. The next prime is 20331321337. The reversal of 20331321312 is 21312313302.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 686778 + ... + 715769.

It is an arithmetic number, because the mean of its divisors is an integer number (1119233304).

Almost surely, 2^20331321312 is an apocalyptic number.

It is an amenable number.

20331321312 is an abundant number, since it is smaller than the sum of its proper divisors (33391877280).

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

20331321312 is a wasteful number, since it uses less digits than its factorization.

20331321312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402711 (or 1402703 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20331321312 its reverse (21312313302), we get a palindrome (41643634614).

The spelling of 20331321312 in words is "twenty billion, three hundred thirty-one million, three hundred twenty-one thousand, three hundred twelve".