20608318097 has 2 divisors, whose sum is σ = 20608318098. Its totient is φ = 20608318096.

The previous prime is 20608318069. The next prime is 20608318109. The reversal of 20608318097 is 79081380602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14740145281 + 5868172816 = 121409^2 + 76604^2 .

It is a cyclic number.

It is not a de Polignac number, because 20608318097 - 2¹⁴ = 20608301713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20608318057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10304159048 + 10304159049.

It is an arithmetic number, because the mean of its divisors is an integer number (10304159049).

Almost surely, 2^20608318097 is an apocalyptic number.

It is an amenable number.

20608318097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20608318097 is an equidigital number, since it uses as much as digits as its factorization.

20608318097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

Adding to 20608318097 its reverse (79081380602), we get a palindrome (99689698699).

The spelling of 20608318097 in words is "twenty billion, six hundred eight million, three hundred eighteen thousand, ninety-seven".