20316172913 has 4 divisors (see below), whose sum is σ = 20382349680. Its totient is φ = 20249996148.

The previous prime is 20316172909. The next prime is 20316172937. The reversal of 20316172913 is 31927161302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20316172913 - 2² = 20316172909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20316172963) 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 3 ways as a sum of consecutive naturals, for example, 33087923 + ... + 33088536.

It is an arithmetic number, because the mean of its divisors is an integer number (5095587420).

Almost surely, 2^20316172913 is an apocalyptic number.

It is an amenable number.

20316172913 is a deficient number, since it is larger than the sum of its proper divisors (66176767).

20316172913 is an equidigital number, since it uses as much as digits as its factorization.

20316172913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66176766.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 20316172913 in words is "twenty billion, three hundred sixteen million, one hundred seventy-two thousand, nine hundred thirteen".