20683485397 has 2 divisors, whose sum is σ = 20683485398. Its totient is φ = 20683485396.

The previous prime is 20683485359. The next prime is 20683485401. The reversal of 20683485397 is 79358438602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18615600721 + 2067884676 = 136439^2 + 45474^2 .

It is a cyclic number.

It is not a de Polignac number, because 20683485397 - 2¹¹ = 20683483349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20683485497) 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, 10341742698 + 10341742699.

It is an arithmetic number, because the mean of its divisors is an integer number (10341742699).

Almost surely, 2^20683485397 is an apocalyptic number.

It is an amenable number.

20683485397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20683485397 is an equidigital number, since it uses as much as digits as its factorization.

20683485397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 20683485397 in words is "twenty billion, six hundred eighty-three million, four hundred eighty-five thousand, three hundred ninety-seven".