21416604611417 has 2 divisors, whose sum is σ = 21416604611418. Its totient is φ = 21416604611416.

The previous prime is 21416604611407. The next prime is 21416604611443. The reversal of 21416604611417 is 71411640661412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17848419618121 + 3568184993296 = 4224739^2 + 1888964^2 .

It is a cyclic number.

It is not a de Polignac number, because 21416604611417 - 2¹⁶ = 21416604545881 is a prime.

It is not a weakly prime, because it can be changed into another prime (21416604611407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10708302305708 + 10708302305709.

It is an arithmetic number, because the mean of its divisors is an integer number (10708302305709).

Almost surely, 2^{21416604611417} is an apocalyptic number.

It is an amenable number.

21416604611417 is a deficient number, since it is larger than the sum of its proper divisors (1).

21416604611417 is an equidigital number, since it uses as much as digits as its factorization.

21416604611417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 21416604611417 in words is "twenty-one trillion, four hundred sixteen billion, six hundred four million, six hundred eleven thousand, four hundred seventeen".