20323311312 has 40 divisors (see below), whose sum is σ = 53492495904. Its totient is φ = 6646616704.

The previous prime is 20323311301. The next prime is 20323311341. The reversal of 20323311312 is 21311332302.

It is a super-2 number, since 2×20323311312² (a number of 21 digits) contains 22 as substring.

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, 3991818 + ... + 3996905.

Almost surely, 2^20323311312 is an apocalyptic number.

It is an amenable number.

20323311312 is an abundant number, since it is smaller than the sum of its proper divisors (33169184592).

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

20323311312 is a wasteful number, since it uses less digits than its factorization.

20323311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7988787 (or 7988781 counting only the distinct ones).

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

Adding to 20323311312 its reverse (21311332302), we get a palindrome (41634643614).

The spelling of 20323311312 in words is "twenty billion, three hundred twenty-three million, three hundred eleven thousand, three hundred twelve".