20320000777 has 4 divisors (see below), whose sum is σ = 20323548436. Its totient is φ = 20316453120.

The previous prime is 20320000763. The next prime is 20320000781. The reversal of 20320000777 is 77700002302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6820117056 + 13499883721 = 82584^2 + 116189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320000777 - 2¹¹ = 20319998729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20320004777) 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 in 3 ways as a sum of consecutive naturals, for example, 1765224 + ... + 1776697.

It is an arithmetic number, because the mean of its divisors is an integer number (5080887109).

Almost surely, 2^20320000777 is an apocalyptic number.

It is an amenable number.

20320000777 is a deficient number, since it is larger than the sum of its proper divisors (3547659).

20320000777 is an equidigital number, since it uses as much as digits as its factorization.

20320000777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547658.

The product of its (nonzero) digits is 4116, while the sum is 28.

The spelling of 20320000777 in words is "twenty billion, three hundred twenty million, seven hundred seventy-seven", and thus it is an aban number.