20204442877 has 2 divisors, whose sum is σ = 20204442878. Its totient is φ = 20204442876.

The previous prime is 20204442871. The next prime is 20204442887. The reversal of 20204442877 is 77824440202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18381665241 + 1822777636 = 135579^2 + 42694^2 .

It is a cyclic number.

It is not a de Polignac number, because 20204442877 - 2²³ = 20196054269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20204442871) 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 as a sum of consecutive naturals, namely, 10102221438 + 10102221439.

It is an arithmetic number, because the mean of its divisors is an integer number (10102221439).

Almost surely, 2^20204442877 is an apocalyptic number.

It is an amenable number.

20204442877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204442877 is an equidigital number, since it uses as much as digits as its factorization.

20204442877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200704, while the sum is 40.

The spelling of 20204442877 in words is "twenty billion, two hundred four million, four hundred forty-two thousand, eight hundred seventy-seven".