20004200057 has 2 divisors, whose sum is σ = 20004200058. Its totient is φ = 20004200056.

The previous prime is 20004200023. The next prime is 20004200071. The reversal of 20004200057 is 75000240002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18603868816 + 1400331241 = 136396^2 + 37421^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004200057 - 2²⁶ = 19937091193 is a prime.

It is not a weakly prime, because it can be changed into another prime (20004200857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002100028 + 10002100029.

It is an arithmetic number, because the mean of its divisors is an integer number (10002100029).

Almost surely, 2^20004200057 is an apocalyptic number.

It is an amenable number.

20004200057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004200057 is an equidigital number, since it uses as much as digits as its factorization.

20004200057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 20.

Adding to 20004200057 its reverse (75000240002), we get a palindrome (95004440059).

The spelling of 20004200057 in words is "twenty billion, four million, two hundred thousand, fifty-seven".