20064571057 has 2 divisors, whose sum is σ = 20064571058. Its totient is φ = 20064571056.

The previous prime is 20064571039. The next prime is 20064571073. The reversal of 20064571057 is 75017546002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15685308081 + 4379262976 = 125241^2 + 66176^2 .

It is a cyclic number.

It is not a de Polignac number, because 20064571057 - 2¹¹ = 20064569009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20064571097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10032285528 + 10032285529.

It is an arithmetic number, because the mean of its divisors is an integer number (10032285529).

Almost surely, 2^20064571057 is an apocalyptic number.

It is an amenable number.

20064571057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20064571057 is an equidigital number, since it uses as much as digits as its factorization.

20064571057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 20064571057 in words is "twenty billion, sixty-four million, five hundred seventy-one thousand, fifty-seven".