17364730921 has 2 divisors, whose sum is σ = 17364730922. Its totient is φ = 17364730920.

The previous prime is 17364730919. The next prime is 17364730973. The reversal of 17364730921 is 12903746371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16170682896 + 1194048025 = 127164^2 + 34555^2 .

It is a cyclic number.

It is not a de Polignac number, because 17364730921 - 2¹ = 17364730919 is a prime.

Together with 17364730919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (17364730991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8682365460 + 8682365461.

It is an arithmetic number, because the mean of its divisors is an integer number (8682365461).

Almost surely, 2^17364730921 is an apocalyptic number.

It is an amenable number.

17364730921 is a deficient number, since it is larger than the sum of its proper divisors (1).

17364730921 is an equidigital number, since it uses as much as digits as its factorization.

17364730921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 17364730921 in words is "seventeen billion, three hundred sixty-four million, seven hundred thirty thousand, nine hundred twenty-one".