20131331312 has 40 divisors (see below), whose sum is σ = 39461431152. Its totient is φ = 9948096000.

The previous prime is 20131331291. The next prime is 20131331327. The reversal of 20131331312 is 21313313102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911828 + ... + 933644.

Almost surely, 2^20131331312 is an apocalyptic number.

It is an amenable number.

20131331312 is a deficient number, since it is larger than the sum of its proper divisors (19330099840).

20131331312 is a wasteful number, since it uses less digits than its factorization.

20131331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22497 (or 22491 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20131331312 its reverse (21313313102), we get a palindrome (41444644414).

The spelling of 20131331312 in words is "twenty billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred twelve".