20858006773 has 2 divisors, whose sum is σ = 20858006774. Its totient is φ = 20858006772.

The previous prime is 20858006759. The next prime is 20858006831. The reversal of 20858006773 is 37760085802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20858002929 + 3844 = 144423^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 20858006773 - 2³³ = 12268072181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20858006723) 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, 10429003386 + 10429003387.

It is an arithmetic number, because the mean of its divisors is an integer number (10429003387).

Almost surely, 2^20858006773 is an apocalyptic number.

It is an amenable number.

20858006773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858006773 is an equidigital number, since it uses as much as digits as its factorization.

20858006773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 20858006773 in words is "twenty billion, eight hundred fifty-eight million, six thousand, seven hundred seventy-three".