20473606899709 has 2 divisors, whose sum is σ = 20473606899710. Its totient is φ = 20473606899708.

The previous prime is 20473606899679. The next prime is 20473606899769. The reversal of 20473606899709 is 90799860637402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14957919797209 + 5515687102500 = 3867547^2 + 2348550^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473606899709 - 2⁵ = 20473606899677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20473606899769) by changing a digit.

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 as a sum of consecutive naturals, namely, 10236803449854 + 10236803449855.

It is an arithmetic number, because the mean of its divisors is an integer number (10236803449855).

Almost surely, 2^{20473606899709} is an apocalyptic number.

It is an amenable number.

20473606899709 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473606899709 is an equidigital number, since it uses as much as digits as its factorization.

20473606899709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246903552, while the sum is 70.

The spelling of 20473606899709 in words is "twenty trillion, four hundred seventy-three billion, six hundred six million, eight hundred ninety-nine thousand, seven hundred nine".