20540044417 has 2 divisors, whose sum is σ = 20540044418. Its totient is φ = 20540044416.

The previous prime is 20540044381. The next prime is 20540044423. The reversal of 20540044417 is 71444004502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20350734336 + 189310081 = 142656^2 + 13759^2 .

It is a cyclic number.

It is not a de Polignac number, because 20540044417 - 2⁷ = 20540044289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20540044457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270022208 + 10270022209.

It is an arithmetic number, because the mean of its divisors is an integer number (10270022209).

Almost surely, 2^20540044417 is an apocalyptic number.

It is an amenable number.

20540044417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540044417 is an equidigital number, since it uses as much as digits as its factorization.

20540044417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 31.

Adding to 20540044417 its reverse (71444004502), we get a palindrome (91984048919).

The spelling of 20540044417 in words is "twenty billion, five hundred forty million, forty-four thousand, four hundred seventeen".