21414436317 has 10 divisors (see below), whose sum is σ = 31989466718. Its totient is φ = 14276290824.

The previous prime is 21414436283. The next prime is 21414436349. The reversal of 21414436317 is 71363441412.

21414436317 is a `hidden beast` number, since 2 + 1 + 4 + 14 + 4 + 3 + 631 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17429544441 + 3984891876 = 132021^2 + 63126^2 .

It is not a de Polignac number, because 21414436317 - 2¹⁰ = 21414435293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414436117) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 132187798 + ... + 132187959.

Almost surely, 2^21414436317 is an apocalyptic number.

21414436317 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21414436317 is a deficient number, since it is larger than the sum of its proper divisors (10575030401).

21414436317 is an equidigital number, since it uses as much as digits as its factorization.

21414436317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264375769 (or 264375760 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

Adding to 21414436317 its reverse (71363441412), we get a palindrome (92777877729).

The spelling of 21414436317 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-six thousand, three hundred seventeen".