20312255710321 has 4 divisors (see below), whose sum is σ = 20312285584500. Its totient is φ = 20312225836144.

The previous prime is 20312255710297. The next prime is 20312255710333. The reversal of 20312255710321 is 12301755221302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11931601266225 + 8380654444096 = 3454215^2 + 2894936^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312255710321 - 2⁵ = 20312255710289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312255710381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13892866 + ... + 15285163.

It is an arithmetic number, because the mean of its divisors is an integer number (5078071396125).

Almost surely, 2^{20312255710321} is an apocalyptic number.

It is an amenable number.

20312255710321 is a deficient number, since it is larger than the sum of its proper divisors (29874179).

20312255710321 is an equidigital number, since it uses as much as digits as its factorization.

20312255710321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29874178.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20312255710321 in words is "twenty trillion, three hundred twelve billion, two hundred fifty-five million, seven hundred ten thousand, three hundred twenty-one".