20812364014549 has 2 divisors, whose sum is σ = 20812364014550. Its totient is φ = 20812364014548.

The previous prime is 20812364014499. The next prime is 20812364014577. The reversal of 20812364014549 is 94541046321802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10752955888900 + 10059408125649 = 3279170^2 + 3171657^2 .

It is a cyclic number.

It is not a de Polignac number, because 20812364014549 - 2⁹ = 20812364014037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20812364054549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10406182007274 + 10406182007275.

It is an arithmetic number, because the mean of its divisors is an integer number (10406182007275).

Almost surely, 2^{20812364014549} is an apocalyptic number.

It is an amenable number.

20812364014549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20812364014549 is an equidigital number, since it uses as much as digits as its factorization.

20812364014549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 20812364014549 in words is "twenty trillion, eight hundred twelve billion, three hundred sixty-four million, fourteen thousand, five hundred forty-nine".