20523773089 has 2 divisors, whose sum is σ = 20523773090. Its totient is φ = 20523773088.

The previous prime is 20523773087. The next prime is 20523773093. The reversal of 20523773089 is 98037732502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11910448225 + 8613324864 = 109135^2 + 92808^2 .

It is a cyclic number.

It is not a de Polignac number, because 20523773089 - 2¹ = 20523773087 is a prime.

Together with 20523773087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20523773087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261886544 + 10261886545.

It is an arithmetic number, because the mean of its divisors is an integer number (10261886545).

Almost surely, 2^20523773089 is an apocalyptic number.

It is an amenable number.

20523773089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523773089 is an equidigital number, since it uses as much as digits as its factorization.

20523773089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 20523773089 in words is "twenty billion, five hundred twenty-three million, seven hundred seventy-three thousand, eighty-nine".