20131023012 has 24 divisors (see below), whose sum is σ = 47195010912. Its totient is φ = 6678537600.

The previous prime is 20131022999. The next prime is 20131023023. The reversal of 20131023012 is 21032013102.

It is a junction number, because it is equal to n+sod(n) for n = 20131022982 and 20131023000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3972789 + ... + 3977852.

It is an arithmetic number, because the mean of its divisors is an integer number (1966458788).

Almost surely, 2^20131023012 is an apocalyptic number.

It is an amenable number.

20131023012 is an abundant number, since it is smaller than the sum of its proper divisors (27063987900).

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

20131023012 is a wasteful number, since it uses less digits than its factorization.

20131023012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7950859 (or 7950857 counting only the distinct ones).

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

Adding to 20131023012 its reverse (21032013102), we get a palindrome (41163036114).

The spelling of 20131023012 in words is "twenty billion, one hundred thirty-one million, twenty-three thousand, twelve".