20939676507097 has 2 divisors, whose sum is σ = 20939676507098. Its totient is φ = 20939676507096.

The previous prime is 20939676507089. The next prime is 20939676507133. The reversal of 20939676507097 is 79070567693902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20877488117721 + 62188389376 = 4569189^2 + 249376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20939676507097 - 2³ = 20939676507089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20939676507007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10469838253548 + 10469838253549.

It is an arithmetic number, because the mean of its divisors is an integer number (10469838253549).

Almost surely, 2^{20939676507097} is an apocalyptic number.

It is an amenable number.

20939676507097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20939676507097 is an equidigital number, since it uses as much as digits as its factorization.

20939676507097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270050760, while the sum is 70.

The spelling of 20939676507097 in words is "twenty trillion, nine hundred thirty-nine billion, six hundred seventy-six million, five hundred seven thousand, ninety-seven".