21430441434317 has 2 divisors, whose sum is σ = 21430441434318. Its totient is φ = 21430441434316.

The previous prime is 21430441434293. The next prime is 21430441434329. The reversal of 21430441434317 is 71343414403412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18193730998921 + 3236710435396 = 4265411^2 + 1799086^2 .

It is a cyclic number.

It is not a de Polignac number, because 21430441434317 - 2⁶ = 21430441434253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21430441434397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715220717158 + 10715220717159.

It is an arithmetic number, because the mean of its divisors is an integer number (10715220717159).

Almost surely, 2^{21430441434317} is an apocalyptic number.

It is an amenable number.

21430441434317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21430441434317 is an equidigital number, since it uses as much as digits as its factorization.

21430441434317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 41.

Adding to 21430441434317 its reverse (71343414403412), we get a palindrome (92773855837729).

The spelling of 21430441434317 in words is "twenty-one trillion, four hundred thirty billion, four hundred forty-one million, four hundred thirty-four thousand, three hundred seventeen".