20445269093 has 2 divisors, whose sum is σ = 20445269094. Its totient is φ = 20445269092.

The previous prime is 20445269063. The next prime is 20445269099. The reversal of 20445269093 is 39096254402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14251106884 + 6194162209 = 119378^2 + 78703^2 .

It is a cyclic number.

It is not a de Polignac number, because 20445269093 - 2²² = 20441074789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20445269099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222634546 + 10222634547.

It is an arithmetic number, because the mean of its divisors is an integer number (10222634547).

Almost surely, 2^20445269093 is an apocalyptic number.

It is an amenable number.

20445269093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445269093 is an equidigital number, since it uses as much as digits as its factorization.

20445269093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 20445269093 in words is "twenty billion, four hundred forty-five million, two hundred sixty-nine thousand, ninety-three".