20780762530777 has 4 divisors (see below), whose sum is σ = 20780786378880. Its totient is φ = 20780738682676.

The previous prime is 20780762530769. The next prime is 20780762530799. The reversal of 20780762530777 is 77703526708702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20780762530777 - 2³ = 20780762530769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20780762530727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10565377 + ... + 12376942.

It is an arithmetic number, because the mean of its divisors is an integer number (5195196594720).

Almost surely, 2^{20780762530777} is an apocalyptic number.

It is an amenable number.

20780762530777 is a deficient number, since it is larger than the sum of its proper divisors (23848103).

20780762530777 is an equidigital number, since it uses as much as digits as its factorization.

20780762530777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23848102.

The product of its (nonzero) digits is 48404160, while the sum is 61.

The spelling of 20780762530777 in words is "twenty trillion, seven hundred eighty billion, seven hundred sixty-two million, five hundred thirty thousand, seven hundred seventy-seven".