20416057 has 2 divisors, whose sum is σ = 20416058. Its totient is φ = 20416056.

The previous prime is 20416043. The next prime is 20416061. The reversal of 20416057 is 75061402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15492096 + 4923961 = 3936^2 + 2219^2 .

It is a cyclic number.

It is not a de Polignac number, because 20416057 - 2¹⁹ = 19891769 is a prime.

It is not a weakly prime, because it can be changed into another prime (20416457) 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, 10208028 + 10208029.

It is an arithmetic number, because the mean of its divisors is an integer number (10208029).

Almost surely, 2^20416057 is an apocalyptic number.

It is an amenable number.

20416057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20416057 is an equidigital number, since it uses as much as digits as its factorization.

20416057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20416057 is about 4518.4131063903. The cubic root of 20416057 is about 273.3111124444.

Adding to 20416057 its reverse (75061402), we get a palindrome (95477459).

It can be divided in two parts, 204 and 16057, that added together give a palindrome (16261).

The spelling of 20416057 in words is "twenty million, four hundred sixteen thousand, fifty-seven".