20964760277 has 2 divisors, whose sum is σ = 20964760278. Its totient is φ = 20964760276.

The previous prime is 20964760249. The next prime is 20964760279. The reversal of 20964760277 is 77206746902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20899328356 + 65431921 = 144566^2 + 8089^2 .

It is a cyclic number.

It is not a de Polignac number, because 20964760277 - 2⁸ = 20964760021 is a prime.

Together with 20964760279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20964760279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10482380138 + 10482380139.

It is an arithmetic number, because the mean of its divisors is an integer number (10482380139).

Almost surely, 2^20964760277 is an apocalyptic number.

It is an amenable number.

20964760277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20964760277 is an equidigital number, since it uses as much as digits as its factorization.

20964760277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The spelling of 20964760277 in words is "twenty billion, nine hundred sixty-four million, seven hundred sixty thousand, two hundred seventy-seven".