20310331312 has 20 divisors (see below), whose sum is σ = 39496482976. Its totient is φ = 10117690560.

The previous prime is 20310331303. The next prime is 20310331313. The reversal of 20310331312 is 21313301302.

It is a self number, because there is not a number n which added to its sum of digits gives 20310331312.

It is not an unprimeable number, because it can be changed into a prime (20310331313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2337723 + ... + 2346394.

Almost surely, 2^20310331312 is an apocalyptic number.

It is an amenable number.

20310331312 is a deficient number, since it is larger than the sum of its proper divisors (19186151664).

20310331312 is a wasteful number, since it uses less digits than its factorization.

20310331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684396 (or 4684390 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20310331312 its reverse (21313301302), we get a palindrome (41623632614).

The spelling of 20310331312 in words is "twenty billion, three hundred ten million, three hundred thirty-one thousand, three hundred twelve".