20011000057 has 2 divisors, whose sum is σ = 20011000058. Its totient is φ = 20011000056.

The previous prime is 20011000039. The next prime is 20011000099. The reversal of 20011000057 is 75000011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19650152041 + 360848016 = 140179^2 + 18996^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011000057 - 2¹¹ = 20010998009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011000057.

It is not a weakly prime, because it can be changed into another prime (20011000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500028 + 10005500029.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500029).

Almost surely, 2^20011000057 is an apocalyptic number.

It is an amenable number.

20011000057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011000057 is an equidigital number, since it uses as much as digits as its factorization.

20011000057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70, while the sum is 16.

Adding to 20011000057 its reverse (75000011002), we get a palindrome (95011011059).

The spelling of 20011000057 in words is "twenty billion, eleven million, fifty-seven", and thus it is an aban number and an uban number.