21412135417 has 2 divisors, whose sum is σ = 21412135418. Its totient is φ = 21412135416.

The previous prime is 21412135397. The next prime is 21412135469. The reversal of 21412135417 is 71453121412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20216289856 + 1195845561 = 142184^2 + 34581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21412135417 is a prime.

It is not a weakly prime, because it can be changed into another prime (21412135517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706067708 + 10706067709.

It is an arithmetic number, because the mean of its divisors is an integer number (10706067709).

Almost surely, 2^21412135417 is an apocalyptic number.

It is an amenable number.

21412135417 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412135417 is an equidigital number, since it uses as much as digits as its factorization.

21412135417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

Adding to 21412135417 its reverse (71453121412), we get a palindrome (92865256829).

The spelling of 21412135417 in words is "twenty-one billion, four hundred twelve million, one hundred thirty-five thousand, four hundred seventeen".