20404511125241 has 4 divisors (see below), whose sum is σ = 20739011307684. Its totient is φ = 20070010942800.

The previous prime is 20404511125123. The next prime is 20404511125261. The reversal of 20404511125241 is 14252111540402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4865178661225 + 15539332464016 = 2205715^2 + 3941996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20404511125241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20404511125198 and 20404511125207.

It is not an unprimeable number, because it can be changed into a prime (20404511125261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167250091130 + ... + 167250091251.

It is an arithmetic number, because the mean of its divisors is an integer number (5184752826921).

Almost surely, 2^{20404511125241} is an apocalyptic number.

It is an amenable number.

20404511125241 is a deficient number, since it is larger than the sum of its proper divisors (334500182443).

20404511125241 is an equidigital number, since it uses as much as digits as its factorization.

20404511125241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334500182442.

The product of its (nonzero) digits is 12800, while the sum is 32.

Adding to 20404511125241 its reverse (14252111540402), we get a palindrome (34656622665643).

The spelling of 20404511125241 in words is "twenty trillion, four hundred four billion, five hundred eleven million, one hundred twenty-five thousand, two hundred forty-one".