20031131312 has 10 divisors (see below), whose sum is σ = 38810316948. Its totient is φ = 10015565648.

The previous prime is 20031131287. The next prime is 20031131317. The reversal of 20031131312 is 21313113002.

It is not an unprimeable number, because it can be changed into a prime (20031131317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625972838 + ... + 625972869.

Almost surely, 2^20031131312 is an apocalyptic number.

It is an amenable number.

20031131312 is a deficient number, since it is larger than the sum of its proper divisors (18779185636).

20031131312 is a wasteful number, since it uses less digits than its factorization.

20031131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251945715 (or 1251945709 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20031131312 its reverse (21313113002), we get a palindrome (41344244314).

The spelling of 20031131312 in words is "twenty billion, thirty-one million, one hundred thirty-one thousand, three hundred twelve".