20312655265 has 12 divisors (see below), whose sum is σ = 28354808916. Its totient is φ = 13928677728.

The previous prime is 20312655257. The next prime is 20312655269. The reversal of 20312655265 is 56255621302.

It can be written as a sum of positive squares in 2 ways, for example, as 9157915809 + 11154739456 = 95697^2 + 105616^2 .

It is not a de Polignac number, because 20312655265 - 2³ = 20312655257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20312655269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41454154 + ... + 41454643.

It is an arithmetic number, because the mean of its divisors is an integer number (2362900743).

Almost surely, 2^20312655265 is an apocalyptic number.

It is an amenable number.

20312655265 is a deficient number, since it is larger than the sum of its proper divisors (8042153651).

20312655265 is an equidigital number, since it uses as much as digits as its factorization.

20312655265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82908816 (or 82908809 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20312655265 in words is "twenty billion, three hundred twelve million, six hundred fifty-five thousand, two hundred sixty-five".