20050425404549 has 2 divisors, whose sum is σ = 20050425404550. Its totient is φ = 20050425404548.

The previous prime is 20050425404479. The next prime is 20050425404563. The reversal of 20050425404549 is 94540452405002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13452683484100 + 6597741920449 = 3667790^2 + 2568607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20050425404549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20050425464549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025212702274 + 10025212702275.

It is an arithmetic number, because the mean of its divisors is an integer number (10025212702275).

Almost surely, 2^{20050425404549} is an apocalyptic number.

It is an amenable number.

20050425404549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20050425404549 is an equidigital number, since it uses as much as digits as its factorization.

20050425404549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 20050425404549 in words is "twenty trillion, fifty billion, four hundred twenty-five million, four hundred four thousand, five hundred forty-nine".