21230326404193 has 2 divisors, whose sum is σ = 21230326404194. Its totient is φ = 21230326404192.

The previous prime is 21230326404143. The next prime is 21230326404197. The reversal of 21230326404193 is 39140462303212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17659560619584 + 3570765784609 = 4202328^2 + 1889647^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230326404193 - 2⁹ = 21230326403681 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230326404197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615163202096 + 10615163202097.

It is an arithmetic number, because the mean of its divisors is an integer number (10615163202097).

Almost surely, 2^{21230326404193} is an apocalyptic number.

It is an amenable number.

21230326404193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230326404193 is an equidigital number, since it uses as much as digits as its factorization.

21230326404193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 21230326404193 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty-six million, four hundred four thousand, one hundred ninety-three".