20766509294899 has 2 divisors, whose sum is σ = 20766509294900. Its totient is φ = 20766509294898.

The previous prime is 20766509294873. The next prime is 20766509294903. The reversal of 20766509294899 is 99849290566702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20766509294899 - 2⁹ = 20766509294387 is a prime.

It is not a weakly prime, because it can be changed into another prime (20766509994899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10383254647449 + 10383254647450.

It is an arithmetic number, because the mean of its divisors is an integer number (10383254647450).

Almost surely, 2^{20766509294899} is an apocalyptic number.

20766509294899 is a deficient number, since it is larger than the sum of its proper divisors (1).

20766509294899 is an equidigital number, since it uses as much as digits as its factorization.

20766509294899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058158080, while the sum is 76.

The spelling of 20766509294899 in words is "twenty trillion, seven hundred sixty-six billion, five hundred nine million, two hundred ninety-four thousand, eight hundred ninety-nine".