20128472713 has 2 divisors, whose sum is σ = 20128472714. Its totient is φ = 20128472712.

The previous prime is 20128472711. The next prime is 20128472773. The reversal of 20128472713 is 31727482102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19941111369 + 187361344 = 141213^2 + 13688^2 .

It is a cyclic number.

It is not a de Polignac number, because 20128472713 - 2¹ = 20128472711 is a prime.

Together with 20128472711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20128472711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064236356 + 10064236357.

It is an arithmetic number, because the mean of its divisors is an integer number (10064236357).

Almost surely, 2^20128472713 is an apocalyptic number.

It is an amenable number.

20128472713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20128472713 is an equidigital number, since it uses as much as digits as its factorization.

20128472713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 20128472713 in words is "twenty billion, one hundred twenty-eight million, four hundred seventy-two thousand, seven hundred thirteen".