20013124161449 has 2 divisors, whose sum is σ = 20013124161450. Its totient is φ = 20013124161448.

The previous prime is 20013124161403. The next prime is 20013124161629. The reversal of 20013124161449 is 94416142131002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13574014909849 + 6439109251600 = 3684293^2 + 2537540^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013124161449 - 2⁸ = 20013124161193 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013124101449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006562080724 + 10006562080725.

It is an arithmetic number, because the mean of its divisors is an integer number (10006562080725).

Almost surely, 2^{20013124161449} is an apocalyptic number.

It is an amenable number.

20013124161449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013124161449 is an equidigital number, since it uses as much as digits as its factorization.

20013124161449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 20013124161449 in words is "twenty trillion, thirteen billion, one hundred twenty-four million, one hundred sixty-one thousand, four hundred forty-nine".