20577050811 has 8 divisors (see below), whose sum is σ = 30484519760. Its totient is φ = 13718033856.

The previous prime is 20577050803. The next prime is 20577050821. The reversal of 20577050811 is 11805077502.

20577050811 is a `hidden beast` number, since 2 + 0 + 577 + 0 + 5 + 0 + 81 + 1 = 666.

It is not a de Polignac number, because 20577050811 - 2³ = 20577050803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20577050821) 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 7 ways as a sum of consecutive naturals, for example, 381056470 + ... + 381056523.

It is an arithmetic number, because the mean of its divisors is an integer number (3810564970).

Almost surely, 2^20577050811 is an apocalyptic number.

20577050811 is a deficient number, since it is larger than the sum of its proper divisors (9907468949).

20577050811 is an equidigital number, since it uses as much as digits as its factorization.

20577050811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762113002 (or 762112996 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The spelling of 20577050811 in words is "twenty billion, five hundred seventy-seven million, fifty thousand, eight hundred eleven".