21414431417 has 2 divisors, whose sum is σ = 21414431418. Its totient is φ = 21414431416.

The previous prime is 21414431413. The next prime is 21414431443. The reversal of 21414431417 is 71413441412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18240123136 + 3174308281 = 135056^2 + 56341^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414431417 - 2² = 21414431413 is a prime.

It is not a weakly prime, because it can be changed into another prime (21414431413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707215708 + 10707215709.

It is an arithmetic number, because the mean of its divisors is an integer number (10707215709).

Almost surely, 2^21414431417 is an apocalyptic number.

It is an amenable number.

21414431417 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414431417 is an equidigital number, since it uses as much as digits as its factorization.

21414431417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 32.

Adding to 21414431417 its reverse (71413441412), we get a palindrome (92827872829).

The spelling of 21414431417 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-one thousand, four hundred seventeen".