20225510549 has 2 divisors, whose sum is σ = 20225510550. Its totient is φ = 20225510548.

The previous prime is 20225510537. The next prime is 20225510579. The reversal of 20225510549 is 94501552202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12412188100 + 7813322449 = 111410^2 + 88393^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225510549 - 2⁴ = 20225510533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20225510579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112755274 + 10112755275.

It is an arithmetic number, because the mean of its divisors is an integer number (10112755275).

Almost surely, 2^20225510549 is an apocalyptic number.

It is an amenable number.

20225510549 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225510549 is an equidigital number, since it uses as much as digits as its factorization.

20225510549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 20225510549 in words is "twenty billion, two hundred twenty-five million, five hundred ten thousand, five hundred forty-nine".