21464301317 has 2 divisors, whose sum is σ = 21464301318. Its totient is φ = 21464301316.

The previous prime is 21464301307. The next prime is 21464301347. The reversal of 21464301317 is 71310346412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12135445921 + 9328855396 = 110161^2 + 96586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21464301317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21464301307) 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, 10732150658 + 10732150659.

It is an arithmetic number, because the mean of its divisors is an integer number (10732150659).

Almost surely, 2^21464301317 is an apocalyptic number.

It is an amenable number.

21464301317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21464301317 is an equidigital number, since it uses as much as digits as its factorization.

21464301317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

Adding to 21464301317 its reverse (71310346412), we get a palindrome (92774647729).

The spelling of 21464301317 in words is "twenty-one billion, four hundred sixty-four million, three hundred one thousand, three hundred seventeen".