20130021012 has 48 divisors (see below), whose sum is σ = 47178512640. Its totient is φ = 6680268672.

The previous prime is 20130020951. The next prime is 20130021013. The reversal of 20130021012 is 21012003102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130021013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6875893 + ... + 6878819.

It is an arithmetic number, because the mean of its divisors is an integer number (982885680).

Almost surely, 2^20130021012 is an apocalyptic number.

It is an amenable number.

20130021012 is an abundant number, since it is smaller than the sum of its proper divisors (27048491628).

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

20130021012 is a wasteful number, since it uses less digits than its factorization.

20130021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280 (or 5278 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20130021012 its reverse (21012003102), we get a palindrome (41142024114).

The spelling of 20130021012 in words is "twenty billion, one hundred thirty million, twenty-one thousand, twelve".