20607591013 has 2 divisors, whose sum is σ = 20607591014. Its totient is φ = 20607591012.

The previous prime is 20607590999. The next prime is 20607591049. The reversal of 20607591013 is 31019570602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14593123204 + 6014467809 = 120802^2 + 77553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20607591013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20607591013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20607591073) 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 as a sum of consecutive naturals, namely, 10303795506 + 10303795507.

It is an arithmetic number, because the mean of its divisors is an integer number (10303795507).

Almost surely, 2^20607591013 is an apocalyptic number.

It is an amenable number.

20607591013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20607591013 is an equidigital number, since it uses as much as digits as its factorization.

20607591013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The spelling of 20607591013 in words is "twenty billion, six hundred seven million, five hundred ninety-one thousand, thirteen".