20765222277643 has 2 divisors, whose sum is σ = 20765222277644. Its totient is φ = 20765222277642.

The previous prime is 20765222277641. The next prime is 20765222277671. The reversal of 20765222277643 is 34677222256702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20765222277643 - 2¹ = 20765222277641 is a prime.

It is a super-2 number, since 2×20765222277643² (a number of 27 digits) contains 22 as substring.

Together with 20765222277641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20765222277641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382611138821 + 10382611138822.

It is an arithmetic number, because the mean of its divisors is an integer number (10382611138822).

Almost surely, 2^{20765222277643} is an apocalyptic number.

20765222277643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20765222277643 is an equidigital number, since it uses as much as digits as its factorization.

20765222277643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23708160, while the sum is 55.

The spelling of 20765222277643 in words is "twenty trillion, seven hundred sixty-five billion, two hundred twenty-two million, two hundred seventy-seven thousand, six hundred forty-three".