20550254117 has 2 divisors, whose sum is σ = 20550254118. Its totient is φ = 20550254116.

The previous prime is 20550254093. The next prime is 20550254119. The reversal of 20550254117 is 71145205502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19180588036 + 1369666081 = 138494^2 + 37009^2 .

It is a cyclic number.

It is not a de Polignac number, because 20550254117 - 2²⁶ = 20483145253 is a prime.

Together with 20550254119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20550254119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275127058 + 10275127059.

It is an arithmetic number, because the mean of its divisors is an integer number (10275127059).

Almost surely, 2^20550254117 is an apocalyptic number.

It is an amenable number.

20550254117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550254117 is an equidigital number, since it uses as much as digits as its factorization.

20550254117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 32.

Adding to 20550254117 its reverse (71145205502), we get a palindrome (91695459619).

The spelling of 20550254117 in words is "twenty billion, five hundred fifty million, two hundred fifty-four thousand, one hundred seventeen".