20531630312 has 16 divisors (see below), whose sum is σ = 38719334340. Its totient is φ = 10206474496.

The previous prime is 20531630233. The next prime is 20531630321. The reversal of 20531630312 is 21303613502.

It can be written as a sum of positive squares in 2 ways, for example, as 14188144996 + 6343485316 = 119114^2 + 79646^2 .

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, 7416113 + ... + 7418880.

Almost surely, 2^20531630312 is an apocalyptic number.

It is an amenable number.

20531630312 is a deficient number, since it is larger than the sum of its proper divisors (18187704028).

20531630312 is a wasteful number, since it uses less digits than its factorization.

20531630312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14835172 (or 14835168 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The spelling of 20531630312 in words is "twenty billion, five hundred thirty-one million, six hundred thirty thousand, three hundred twelve".