21163316346593 has 2 divisors, whose sum is σ = 21163316346594. Its totient is φ = 21163316346592.

The previous prime is 21163316346583. The next prime is 21163316346703. The reversal of 21163316346593 is 39564361336112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16533193606609 + 4630122739984 = 4066103^2 + 2151772^2 .

It is a cyclic number.

It is not a de Polignac number, because 21163316346593 - 2¹⁴ = 21163316330209 is a prime.

It is not a weakly prime, because it can be changed into another prime (21163316346533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581658173296 + 10581658173297.

It is an arithmetic number, because the mean of its divisors is an integer number (10581658173297).

Almost surely, 2^{21163316346593} is an apocalyptic number.

It is an amenable number.

21163316346593 is a deficient number, since it is larger than the sum of its proper divisors (1).

21163316346593 is an equidigital number, since it uses as much as digits as its factorization.

21163316346593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 53.

The spelling of 21163316346593 in words is "twenty-one trillion, one hundred sixty-three billion, three hundred sixteen million, three hundred forty-six thousand, five hundred ninety-three".