20116707665449 has 2 divisors, whose sum is σ = 20116707665450. Its totient is φ = 20116707665448.

The previous prime is 20116707665419. The next prime is 20116707665473. The reversal of 20116707665449 is 94456670761102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15573820391424 + 4542887274025 = 3946368^2 + 2131405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116707665449 - 2²⁹ = 20116170794537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20116707665393 and 20116707665402.

It is not a weakly prime, because it can be changed into another prime (20116707665419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058353832724 + 10058353832725.

It is an arithmetic number, because the mean of its divisors is an integer number (10058353832725).

Almost surely, 2^{20116707665449} is an apocalyptic number.

It is an amenable number.

20116707665449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116707665449 is an equidigital number, since it uses as much as digits as its factorization.

20116707665449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 20116707665449 in words is "twenty trillion, one hundred sixteen billion, seven hundred seven million, six hundred sixty-five thousand, four hundred forty-nine".