20651775395297 has 2 divisors, whose sum is σ = 20651775395298. Its totient is φ = 20651775395296.

The previous prime is 20651775395257. The next prime is 20651775395333. The reversal of 20651775395297 is 79259357715602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17000374168801 + 3651401226496 = 4123151^2 + 1910864^2 .

It is a cyclic number.

It is not a de Polignac number, because 20651775395297 - 2⁶ = 20651775395233 is a prime.

It is not a weakly prime, because it can be changed into another prime (20651775395227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10325887697648 + 10325887697649.

It is an arithmetic number, because the mean of its divisors is an integer number (10325887697649).

Almost surely, 2^{20651775395297} is an apocalyptic number.

It is an amenable number.

20651775395297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651775395297 is an equidigital number, since it uses as much as digits as its factorization.

20651775395297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250047000, while the sum is 68.

The spelling of 20651775395297 in words is "twenty trillion, six hundred fifty-one billion, seven hundred seventy-five million, three hundred ninety-five thousand, two hundred ninety-seven".