20145422641 has 2 divisors, whose sum is σ = 20145422642. Its totient is φ = 20145422640.

The previous prime is 20145422629. The next prime is 20145422669. The reversal of 20145422641 is 14622454102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14835240000 + 5310182641 = 121800^2 + 72871^2 .

It is a cyclic number.

It is not a de Polignac number, because 20145422641 - 2⁷ = 20145422513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20145422681) 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, 10072711320 + 10072711321.

It is an arithmetic number, because the mean of its divisors is an integer number (10072711321).

Almost surely, 2^20145422641 is an apocalyptic number.

It is an amenable number.

20145422641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145422641 is an equidigital number, since it uses as much as digits as its factorization.

20145422641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 20145422641 its reverse (14622454102), we get a palindrome (34767876743).

The spelling of 20145422641 in words is "twenty billion, one hundred forty-five million, four hundred twenty-two thousand, six hundred forty-one".