20761055771 has 2 divisors, whose sum is σ = 20761055772. Its totient is φ = 20761055770.

The previous prime is 20761055753. The next prime is 20761055779. The reversal of 20761055771 is 17755016702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20761055771 - 2²⁶ = 20693946907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20761055779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380527885 + 10380527886.

It is an arithmetic number, because the mean of its divisors is an integer number (10380527886).

Almost surely, 2^20761055771 is an apocalyptic number.

20761055771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20761055771 is an equidigital number, since it uses as much as digits as its factorization.

20761055771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102900, while the sum is 41.

The spelling of 20761055771 in words is "twenty billion, seven hundred sixty-one million, fifty-five thousand, seven hundred seventy-one".