20000031312 has 40 divisors (see below), whose sum is σ = 52178312160. Its totient is φ = 6600668800.

The previous prime is 20000031257. The next prime is 20000031329. The reversal of 20000031312 is 21313000002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 2057862 + ... + 2067557.

It is an arithmetic number, because the mean of its divisors is an integer number (1304457804).

Almost surely, 2^20000031312 is an apocalyptic number.

It is an amenable number.

20000031312 is an abundant number, since it is smaller than the sum of its proper divisors (32178280848).

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

20000031312 is a wasteful number, since it uses less digits than its factorization.

20000031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125531 (or 4125525 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20000031312 its reverse (21313000002), we get a palindrome (41313031314).

The spelling of 20000031312 in words is "twenty billion, thirty-one thousand, three hundred twelve".