20041005461 has 2 divisors, whose sum is σ = 20041005462. Its totient is φ = 20041005460.

The previous prime is 20041005443. The next prime is 20041005527. The reversal of 20041005461 is 16450014002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19117210225 + 923795236 = 138265^2 + 30394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20041005461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20041005431) 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, 10020502730 + 10020502731.

It is an arithmetic number, because the mean of its divisors is an integer number (10020502731).

Almost surely, 2^20041005461 is an apocalyptic number.

It is an amenable number.

20041005461 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041005461 is an equidigital number, since it uses as much as digits as its factorization.

20041005461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20041005461 its reverse (16450014002), we get a palindrome (36491019463).

The spelling of 20041005461 in words is "twenty billion, forty-one million, five thousand, four hundred sixty-one".