20131002312 has 16 divisors (see below), whose sum is σ = 50327505840. Its totient is φ = 6710334096.

The previous prime is 20131002299. The next prime is 20131002329. The reversal of 20131002312 is 21320013102.

It is a junction number, because it is equal to n+sod(n) for n = 20131002291 and 20131002300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419395858 + ... + 419395905.

It is an arithmetic number, because the mean of its divisors is an integer number (3145469115).

Almost surely, 2^20131002312 is an apocalyptic number.

It is an amenable number.

20131002312 is an abundant number, since it is smaller than the sum of its proper divisors (30196503528).

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

20131002312 is a wasteful number, since it uses less digits than its factorization.

20131002312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838791772 (or 838791768 counting only the distinct ones).

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

Adding to 20131002312 its reverse (21320013102), we get a palindrome (41451015414).

The spelling of 20131002312 in words is "twenty billion, one hundred thirty-one million, two thousand, three hundred twelve".