20320347934765 has 4 divisors (see below), whose sum is σ = 24384417521724. Its totient is φ = 16256278347808.

The previous prime is 20320347934723. The next prime is 20320347934829. The reversal of 20320347934765 is 56743974302302.

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 5030519665924 + 15289828268841 = 2242882^2 + 3910221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320347934765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2032034793472 + ... + 2032034793481.

It is an arithmetic number, because the mean of its divisors is an integer number (6096104380431).

Almost surely, 2^{20320347934765} is an apocalyptic number.

It is an amenable number.

20320347934765 is a deficient number, since it is larger than the sum of its proper divisors (4064069586959).

20320347934765 is an equidigital number, since it uses as much as digits as its factorization.

20320347934765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064069586958.

The product of its (nonzero) digits is 22861440, while the sum is 55.

The spelling of 20320347934765 in words is "twenty trillion, three hundred twenty billion, three hundred forty-seven million, nine hundred thirty-four thousand, seven hundred sixty-five".