20312132311312 has 20 divisors (see below), whose sum is σ = 39354909768540. Its totient is φ = 10156026564608.

The previous prime is 20312132311279. The next prime is 20312132311319. The reversal of 20312132311312 is 21311323121302.

It can be written as a sum of positive squares in 2 ways, for example, as 14539914639376 + 5772217671936 = 3813124^2 + 2402544^2 .

It is a super-2 number, since 2×20312132311312² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20312132311319) 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, 2003808 + ... + 6681280.

It is an arithmetic number, because the mean of its divisors is an integer number (1967745488427).

Almost surely, 2^{20312132311312} is an apocalyptic number.

It is an amenable number.

20312132311312 is a deficient number, since it is larger than the sum of its proper divisors (19042777457228).

20312132311312 is a wasteful number, since it uses less digits than its factorization.

20312132311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948890 (or 4948884 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 20312132311312 its reverse (21311323121302), we get a palindrome (41623455432614).

The spelling of 20312132311312 in words is "twenty trillion, three hundred twelve billion, one hundred thirty-two million, three hundred eleven thousand, three hundred twelve".