20473053511609 has 2 divisors, whose sum is σ = 20473053511610. Its totient is φ = 20473053511608.

The previous prime is 20473053511577. The next prime is 20473053511619. The reversal of 20473053511609 is 90611535037402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16109667279225 + 4363386232384 = 4013685^2 + 2088872^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473053511609 - 2⁵ = 20473053511577 is a prime.

It is not a weakly prime, because it can be changed into another prime (20473053511619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236526755804 + 10236526755805.

It is an arithmetic number, because the mean of its divisors is an integer number (10236526755805).

Almost surely, 2^{20473053511609} is an apocalyptic number.

It is an amenable number.

20473053511609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473053511609 is an equidigital number, since it uses as much as digits as its factorization.

20473053511609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 20473053511609 in words is "twenty trillion, four hundred seventy-three billion, fifty-three million, five hundred eleven thousand, six hundred nine".