20065240771 has 2 divisors, whose sum is σ = 20065240772. Its totient is φ = 20065240770.

The previous prime is 20065240759. The next prime is 20065240817. The reversal of 20065240771 is 17704256002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20065240771 - 2²³ = 20056852163 is a prime.

It is a super-2 number, since 2×20065240771² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20065240751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10032620385 + 10032620386.

It is an arithmetic number, because the mean of its divisors is an integer number (10032620386).

Almost surely, 2^20065240771 is an apocalyptic number.

20065240771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20065240771 is an equidigital number, since it uses as much as digits as its factorization.

20065240771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

Adding to 20065240771 its reverse (17704256002), we get a palindrome (37769496773).

The spelling of 20065240771 in words is "twenty billion, sixty-five million, two hundred forty thousand, seven hundred seventy-one".