20131020012 has 24 divisors (see below), whose sum is σ = 47058268096. Its totient is φ = 6698070288.

The previous prime is 20131020001. The next prime is 20131020031. The reversal of 20131020012 is 21002013102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20131020012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526878 + ... + 1540005.

Almost surely, 2^20131020012 is an apocalyptic number.

It is an amenable number.

20131020012 is an abundant number, since it is smaller than the sum of its proper divisors (26927248084).

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

20131020012 is a wasteful number, since it uses less digits than its factorization.

20131020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067437 (or 3067435 counting only the distinct ones).

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

Adding to 20131020012 its reverse (21002013102), we get a palindrome (41133033114).

The spelling of 20131020012 in words is "twenty billion, one hundred thirty-one million, twenty thousand, twelve".