20145422441 has 2 divisors, whose sum is σ = 20145422442. Its totient is φ = 20145422440.

The previous prime is 20145422419. The next prime is 20145422503. The reversal of 20145422441 is 14422454102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14664241216 + 5481181225 = 121096^2 + 74035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20145422441 is a prime.

It is not a weakly prime, because it can be changed into another prime (20145422641) 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, 10072711220 + 10072711221.

It is an arithmetic number, because the mean of its divisors is an integer number (10072711221).

Almost surely, 2^20145422441 is an apocalyptic number.

It is an amenable number.

20145422441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145422441 is an equidigital number, since it uses as much as digits as its factorization.

20145422441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 20145422441 its reverse (14422454102), we get a palindrome (34567876543).

The spelling of 20145422441 in words is "twenty billion, one hundred forty-five million, four hundred twenty-two thousand, four hundred forty-one".