19927342295257 has 2 divisors, whose sum is σ = 19927342295258. Its totient is φ = 19927342295256.

The previous prime is 19927342295249. The next prime is 19927342295297. The reversal of 19927342295257 is 75259224372991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10470019819081 + 9457322476176 = 3235741^2 + 3075276^2 .

It is a cyclic number.

It is not a de Polignac number, because 19927342295257 - 2³ = 19927342295249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19927342295192 and 19927342295201.

It is not a weakly prime, because it can be changed into another prime (19927342295297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9963671147628 + 9963671147629.

It is an arithmetic number, because the mean of its divisors is an integer number (9963671147629).

Almost surely, 2^{19927342295257} is an apocalyptic number.

It is an amenable number.

19927342295257 is a deficient number, since it is larger than the sum of its proper divisors (1).

19927342295257 is an equidigital number, since it uses as much as digits as its factorization.

19927342295257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171460800, while the sum is 67.

The spelling of 19927342295257 in words is "nineteen trillion, nine hundred twenty-seven billion, three hundred forty-two million, two hundred ninety-five thousand, two hundred fifty-seven".