20445839233 has 2 divisors, whose sum is σ = 20445839234. Its totient is φ = 20445839232.

The previous prime is 20445839209. The next prime is 20445839261. The reversal of 20445839233 is 33293854402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12550272784 + 7895566449 = 112028^2 + 88857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20445839233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20445839233.

It is not a weakly prime, because it can be changed into another prime (20445830233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222919616 + 10222919617.

It is an arithmetic number, because the mean of its divisors is an integer number (10222919617).

Almost surely, 2^20445839233 is an apocalyptic number.

It is an amenable number.

20445839233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20445839233 is an equidigital number, since it uses as much as digits as its factorization.

20445839233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 20445839233 in words is "twenty billion, four hundred forty-five million, eight hundred thirty-nine thousand, two hundred thirty-three".