20204220877559 has 2 divisors, whose sum is σ = 20204220877560. Its totient is φ = 20204220877558.

The previous prime is 20204220877523. The next prime is 20204220877571. The reversal of 20204220877559 is 95577802240202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20204220877559 - 2⁸ = 20204220877303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20204220877559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20204220877579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102110438779 + 10102110438780.

It is an arithmetic number, because the mean of its divisors is an integer number (10102110438780).

Almost surely, 2^{20204220877559} is an apocalyptic number.

20204220877559 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204220877559 is an equidigital number, since it uses as much as digits as its factorization.

20204220877559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 20204220877559 in words is "twenty trillion, two hundred four billion, two hundred twenty million, eight hundred seventy-seven thousand, five hundred fifty-nine".