20268340066291 has 2 divisors, whose sum is σ = 20268340066292. Its totient is φ = 20268340066290.

The previous prime is 20268340066267. The next prime is 20268340066319. The reversal of 20268340066291 is 19266004386202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20268340066291 - 2²⁷ = 20268205848563 is a prime.

It is not a weakly prime, because it can be changed into another prime (20268340060291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10134170033145 + 10134170033146.

It is an arithmetic number, because the mean of its divisors is an integer number (10134170033146).

Almost surely, 2^{20268340066291} is an apocalyptic number.

20268340066291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20268340066291 is an equidigital number, since it uses as much as digits as its factorization.

20268340066291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 20268340066291 in words is "twenty trillion, two hundred sixty-eight billion, three hundred forty million, sixty-six thousand, two hundred ninety-one".