20257752777 has 16 divisors (see below), whose sum is σ = 27216851712. Its totient is φ = 13402282320.

The previous prime is 20257752751. The next prime is 20257752883. The reversal of 20257752777 is 77725775202.

It is not a de Polignac number, because 20257752777 - 2⁷ = 20257752649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20257752707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173538 + ... + 265764.

It is an arithmetic number, because the mean of its divisors is an integer number (1701053232).

Almost surely, 2^20257752777 is an apocalyptic number.

It is an amenable number.

20257752777 is a deficient number, since it is larger than the sum of its proper divisors (6959098935).

20257752777 is a wasteful number, since it uses less digits than its factorization.

20257752777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92788.

The product of its (nonzero) digits is 3361400, while the sum is 51.

The spelling of 20257752777 in words is "twenty billion, two hundred fifty-seven million, seven hundred fifty-two thousand, seven hundred seventy-seven".