20593499911 has 2 divisors, whose sum is σ = 20593499912. Its totient is φ = 20593499910.

The previous prime is 20593499909. The next prime is 20593499987. The reversal of 20593499911 is 11999439502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20593499911 - 2¹ = 20593499909 is a prime.

Together with 20593499909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20593499611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10296749955 + 10296749956.

It is an arithmetic number, because the mean of its divisors is an integer number (10296749956).

Almost surely, 2^20593499911 is an apocalyptic number.

20593499911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20593499911 is an equidigital number, since it uses as much as digits as its factorization.

20593499911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 52.

The spelling of 20593499911 in words is "twenty billion, five hundred ninety-three million, four hundred ninety-nine thousand, nine hundred eleven".