20657848297 has 2 divisors, whose sum is σ = 20657848298. Its totient is φ = 20657848296.

The previous prime is 20657848271. The next prime is 20657848301. The reversal of 20657848297 is 79284875602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18447344041 + 2210504256 = 135821^2 + 47016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20657848297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20607848297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10328924148 + 10328924149.

It is an arithmetic number, because the mean of its divisors is an integer number (10328924149).

Almost surely, 2^20657848297 is an apocalyptic number.

It is an amenable number.

20657848297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20657848297 is an equidigital number, since it uses as much as digits as its factorization.

20657848297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 20657848297 in words is "twenty billion, six hundred fifty-seven million, eight hundred forty-eight thousand, two hundred ninety-seven".