20204325457 has 2 divisors, whose sum is σ = 20204325458. Its totient is φ = 20204325456.

The previous prime is 20204325451. The next prime is 20204325481. The reversal of 20204325457 is 75452340202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15413470801 + 4790854656 = 124151^2 + 69216^2 .

It is a cyclic number.

It is not a de Polignac number, because 20204325457 - 2¹¹ = 20204323409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20204325451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102162728 + 10102162729.

It is an arithmetic number, because the mean of its divisors is an integer number (10102162729).

Almost surely, 2^20204325457 is an apocalyptic number.

It is an amenable number.

20204325457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204325457 is an equidigital number, since it uses as much as digits as its factorization.

20204325457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 34.

Adding to 20204325457 its reverse (75452340202), we get a palindrome (95656665659).

The spelling of 20204325457 in words is "twenty billion, two hundred four million, three hundred twenty-five thousand, four hundred fifty-seven".