20516130012 has 48 divisors (see below), whose sum is σ = 54737851392. Its totient is φ = 5858733120.

The previous prime is 20516129981. The next prime is 20516130017. The reversal of 20516130012 is 21003161502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516130017) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 103837 + ... + 227627.

It is an arithmetic number, because the mean of its divisors is an integer number (1140371904).

Almost surely, 2^20516130012 is an apocalyptic number.

It is an amenable number.

20516130012 is an abundant number, since it is smaller than the sum of its proper divisors (34221721380).

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

20516130012 is a wasteful number, since it uses less digits than its factorization.

20516130012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125778 (or 125776 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 20516130012 its reverse (21003161502), we get a palindrome (41519291514).

The spelling of 20516130012 in words is "twenty billion, five hundred sixteen million, one hundred thirty thousand, twelve".