20200057 has 2 divisors, whose sum is σ = 20200058. Its totient is φ = 20200056.

The previous prime is 20200043. The next prime is 20200087. The reversal of 20200057 is 75000202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 30976 = 4491^2 + 176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20200057 is a prime.

It is a super-3 number, since 3×20200057³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20200057.

It is not a weakly prime, because it can be changed into another prime (20200027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100028 + 10100029.

It is an arithmetic number, because the mean of its divisors is an integer number (10100029).

Almost surely, 2^20200057 is an apocalyptic number.

It is an amenable number.

20200057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200057 is an equidigital number, since it uses as much as digits as its factorization.

20200057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 20200057 is about 4494.4473520111. The cubic root of 20200057 is about 272.3438243214.

Adding to 20200057 its reverse (75000202), we get a palindrome (95200259).

The spelling of 20200057 in words is "twenty million, two hundred thousand, fifty-seven".