20812364013461 has 2 divisors, whose sum is σ = 20812364013462. Its totient is φ = 20812364013460.

The previous prime is 20812364013443. The next prime is 20812364013587. The reversal of 20812364013461 is 16431046321802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19171428633361 + 1640935380100 = 4378519^2 + 1280990^2 .

It is a cyclic number.

It is not a de Polignac number, because 20812364013461 - 2³⁴ = 20795184144277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20812364015461) 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, 10406182006730 + 10406182006731.

It is an arithmetic number, because the mean of its divisors is an integer number (10406182006731).

Almost surely, 2^{20812364013461} is an apocalyptic number.

It is an amenable number.

20812364013461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20812364013461 is an equidigital number, since it uses as much as digits as its factorization.

20812364013461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 20812364013461 in words is "twenty trillion, eight hundred twelve billion, three hundred sixty-four million, thirteen thousand, four hundred sixty-one".