21314504017 has 2 divisors, whose sum is σ = 21314504018. Its totient is φ = 21314504016.

The previous prime is 21314503963. The next prime is 21314504021. The reversal of 21314504017 is 71040541312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21159775296 + 154728721 = 145464^2 + 12439^2 .

It is a cyclic number.

It is not a de Polignac number, because 21314504017 - 2¹¹ = 21314501969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21314504047) 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, 10657252008 + 10657252009.

It is an arithmetic number, because the mean of its divisors is an integer number (10657252009).

Almost surely, 2^21314504017 is an apocalyptic number.

It is an amenable number.

21314504017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314504017 is an equidigital number, since it uses as much as digits as its factorization.

21314504017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 21314504017 in words is "twenty-one billion, three hundred fourteen million, five hundred four thousand, seventeen".