20397606485353 has 2 divisors, whose sum is σ = 20397606485354. Its totient is φ = 20397606485352.

The previous prime is 20397606485327. The next prime is 20397606485383. The reversal of 20397606485353 is 35358460679302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15947666863209 + 4449939622144 = 3993453^2 + 2109488^2 .

It is a cyclic number.

It is not a de Polignac number, because 20397606485353 - 2¹³ = 20397606477161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20397606485291 and 20397606485300.

It is not a weakly prime, because it can be changed into another prime (20397606485383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198803242676 + 10198803242677.

It is an arithmetic number, because the mean of its divisors is an integer number (10198803242677).

Almost surely, 2^{20397606485353} is an apocalyptic number.

It is an amenable number.

20397606485353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20397606485353 is an equidigital number, since it uses as much as digits as its factorization.

20397606485353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97977600, while the sum is 61.

The spelling of 20397606485353 in words is "twenty trillion, three hundred ninety-seven billion, six hundred six million, four hundred eighty-five thousand, three hundred fifty-three".