20465456413 has 2 divisors, whose sum is σ = 20465456414. Its totient is φ = 20465456412.

The previous prime is 20465456399. The next prime is 20465456423. The reversal of 20465456413 is 31465456402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15092859609 + 5372596804 = 122853^2 + 73298^2 .

It is a cyclic number.

It is not a de Polignac number, because 20465456413 - 2¹⁷ = 20465325341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20465456423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232728206 + 10232728207.

It is an arithmetic number, because the mean of its divisors is an integer number (10232728207).

Almost surely, 2^20465456413 is an apocalyptic number.

It is an amenable number.

20465456413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20465456413 is an equidigital number, since it uses as much as digits as its factorization.

20465456413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20465456413 in words is "twenty billion, four hundred sixty-five million, four hundred fifty-six thousand, four hundred thirteen".