20603225057 has 2 divisors, whose sum is σ = 20603225058. Its totient is φ = 20603225056.

The previous prime is 20603225029. The next prime is 20603225059. The reversal of 20603225057 is 75052230602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20168544256 + 434680801 = 142016^2 + 20849^2 .

It is a cyclic number.

It is not a de Polignac number, because 20603225057 - 2²⁴ = 20586447841 is a prime.

Together with 20603225059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20603225059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301612528 + 10301612529.

It is an arithmetic number, because the mean of its divisors is an integer number (10301612529).

Almost surely, 2^20603225057 is an apocalyptic number.

It is an amenable number.

20603225057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20603225057 is an equidigital number, since it uses as much as digits as its factorization.

20603225057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 32.

Adding to 20603225057 its reverse (75052230602), we get a palindrome (95655455659).

The spelling of 20603225057 in words is "twenty billion, six hundred three million, two hundred twenty-five thousand, fifty-seven".