20321103012 has 72 divisors (see below), whose sum is σ = 56936597760. Its totient is φ = 5618733120.

The previous prime is 20321103007. The next prime is 20321103071. The reversal of 20321103012 is 21030112302.

It is a junction number, because it is equal to n+sod(n) for n = 20321102982 and 20321103000.

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 23 ways as a sum of consecutive naturals, for example, 539187 + ... + 575642.

It is an arithmetic number, because the mean of its divisors is an integer number (790786080).

Almost surely, 2^20321103012 is an apocalyptic number.

It is an amenable number.

20321103012 is an abundant number, since it is smaller than the sum of its proper divisors (36615494748).

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

20321103012 is a wasteful number, since it uses less digits than its factorization.

20321103012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114881 (or 1114872 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20321103012 its reverse (21030112302), we get a palindrome (41351215314).

The spelling of 20321103012 in words is "twenty billion, three hundred twenty-one million, one hundred three thousand, twelve".