20988030553591 has 2 divisors, whose sum is σ = 20988030553592. Its totient is φ = 20988030553590.

The previous prime is 20988030553531. The next prime is 20988030553597. The reversal of 20988030553591 is 19535503088902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20988030553591 - 2²⁷ = 20987896335863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20988030553597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10494015276795 + 10494015276796.

It is an arithmetic number, because the mean of its divisors is an integer number (10494015276796).

Almost surely, 2^{20988030553591} is an apocalyptic number.

20988030553591 is a deficient number, since it is larger than the sum of its proper divisors (1).

20988030553591 is an equidigital number, since it uses as much as digits as its factorization.

20988030553591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 58.

The spelling of 20988030553591 in words is "twenty trillion, nine hundred eighty-eight billion, thirty million, five hundred fifty-three thousand, five hundred ninety-one".