20225548549 has 2 divisors, whose sum is σ = 20225548550. Its totient is φ = 20225548548.

The previous prime is 20225548529. The next prime is 20225548627. The reversal of 20225548549 is 94584552202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17584616449 + 2640932100 = 132607^2 + 51390^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225548549 - 2⁹ = 20225548037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20225548499 and 20225548508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20225548529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112774274 + 10112774275.

It is an arithmetic number, because the mean of its divisors is an integer number (10112774275).

Almost surely, 2^20225548549 is an apocalyptic number.

It is an amenable number.

20225548549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225548549 is an equidigital number, since it uses as much as digits as its factorization.

20225548549 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 46.

The spelling of 20225548549 in words is "twenty billion, two hundred twenty-five million, five hundred forty-eight thousand, five hundred forty-nine".