21174582346717 has 2 divisors, whose sum is σ = 21174582346718. Its totient is φ = 21174582346716.

The previous prime is 21174582346681. The next prime is 21174582346751. The reversal of 21174582346717 is 71764328547112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19318609346436 + 1855973000281 = 4395294^2 + 1362341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21174582346717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21174582346117) 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, 10587291173358 + 10587291173359.

It is an arithmetic number, because the mean of its divisors is an integer number (10587291173359).

Almost surely, 2^{21174582346717} is an apocalyptic number.

It is an amenable number.

21174582346717 is a deficient number, since it is larger than the sum of its proper divisors (1).

21174582346717 is an equidigital number, since it uses as much as digits as its factorization.

21174582346717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15805440, while the sum is 58.

The spelling of 21174582346717 in words is "twenty-one trillion, one hundred seventy-four billion, five hundred eighty-two million, three hundred forty-six thousand, seven hundred seventeen".