20554363005257 has 2 divisors, whose sum is σ = 20554363005258. Its totient is φ = 20554363005256.

The previous prime is 20554363005203. The next prime is 20554363005301. The reversal of 20554363005257 is 75250036345502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12813564796816 + 7740798208441 = 3579604^2 + 2782229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554363005257 is a prime.

It is not a weakly prime, because it can be changed into another prime (20554363025257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277181502628 + 10277181502629.

It is an arithmetic number, because the mean of its divisors is an integer number (10277181502629).

Almost surely, 2^{20554363005257} is an apocalyptic number.

It is an amenable number.

20554363005257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554363005257 is an equidigital number, since it uses as much as digits as its factorization.

20554363005257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780000, while the sum is 47.

The spelling of 20554363005257 in words is "twenty trillion, five hundred fifty-four billion, three hundred sixty-three million, five thousand, two hundred fifty-seven".