20054420209949 has 2 divisors, whose sum is σ = 20054420209950. Its totient is φ = 20054420209948.

The previous prime is 20054420209909. The next prime is 20054420210023. The reversal of 20054420209949 is 94990202445002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19341040644025 + 713379565924 = 4397845^2 + 844618^2 .

It is a cyclic number.

It is not a de Polignac number, because 20054420209949 - 2²⁸ = 20054151774493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20054420209897 and 20054420209906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20054420209909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027210104974 + 10027210104975.

It is an arithmetic number, because the mean of its divisors is an integer number (10027210104975).

Almost surely, 2^{20054420209949} is an apocalyptic number.

It is an amenable number.

20054420209949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20054420209949 is an equidigital number, since it uses as much as digits as its factorization.

20054420209949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 20054420209949 in words is "twenty trillion, fifty-four billion, four hundred twenty million, two hundred nine thousand, nine hundred forty-nine".