21174582347719 has 2 divisors, whose sum is σ = 21174582347720. Its totient is φ = 21174582347718.

The previous prime is 21174582347717. The next prime is 21174582347741. The reversal of 21174582347719 is 91774328547112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21174582347719 - 2¹ = 21174582347717 is a prime.

It is a super-2 number, since 2×21174582347719² (a number of 27 digits) contains 22 as substring.

Together with 21174582347717, 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 (21174582347717) 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, 10587291173859 + 10587291173860.

It is an arithmetic number, because the mean of its divisors is an integer number (10587291173860).

Almost surely, 2^{21174582347719} is an apocalyptic number.

21174582347719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21174582347719 is an equidigital number, since it uses as much as digits as its factorization.

21174582347719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 61.

The spelling of 21174582347719 in words is "twenty-one trillion, one hundred seventy-four billion, five hundred eighty-two million, three hundred forty-seven thousand, seven hundred nineteen".