20312456312612 has 24 divisors (see below), whose sum is σ = 36236742392760. Its totient is φ = 9960089448960.

The previous prime is 20312456312611. The next prime is 20312456312663. The reversal of 20312456312612 is 21621365421302.

It can be written as a sum of positive squares in 4 ways, for example, as 606616668736 + 19705839643876 = 778856^2 + 4439126^2 .

It is not an unprimeable number, because it can be changed into a prime (20312456312611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123430787 + ... + 123595242.

It is an arithmetic number, because the mean of its divisors is an integer number (1509864266365).

Almost surely, 2^{20312456312612} is an apocalyptic number.

It is an amenable number.

20312456312612 is a deficient number, since it is larger than the sum of its proper divisors (15924286080148).

20312456312612 is a wasteful number, since it uses less digits than its factorization.

20312456312612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247026431 (or 247026429 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 20312456312612 in words is "twenty trillion, three hundred twelve billion, four hundred fifty-six million, three hundred twelve thousand, six hundred twelve".