20540364252673 has 2 divisors, whose sum is σ = 20540364252674. Its totient is φ = 20540364252672.

The previous prime is 20540364252599. The next prime is 20540364252677. The reversal of 20540364252673 is 37625246304502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17548491784464 + 2991872468209 = 4189092^2 + 1729703^2 .

It is a cyclic number.

It is not a de Polignac number, because 20540364252673 - 2¹⁷ = 20540364121601 is a prime.

It is not a weakly prime, because it can be changed into another prime (20540364252677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270182126336 + 10270182126337.

It is an arithmetic number, because the mean of its divisors is an integer number (10270182126337).

Almost surely, 2^{20540364252673} is an apocalyptic number.

It is an amenable number.

20540364252673 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540364252673 is an equidigital number, since it uses as much as digits as its factorization.

20540364252673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 49.

The spelling of 20540364252673 in words is "twenty trillion, five hundred forty billion, three hundred sixty-four million, two hundred fifty-two thousand, six hundred seventy-three".