20683057 has 2 divisors, whose sum is σ = 20683058. Its totient is φ = 20683056.

The previous prime is 20683031. The next prime is 20683063. The reversal of 20683057 is 75038602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 4004001 = 4084^2 + 2001^2 .

It is a cyclic number.

It is not a de Polignac number, because 20683057 - 2¹¹ = 20681009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20683007) 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, 10341528 + 10341529.

It is an arithmetic number, because the mean of its divisors is an integer number (10341529).

Almost surely, 2^20683057 is an apocalyptic number.

It is an amenable number.

20683057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20683057 is an equidigital number, since it uses as much as digits as its factorization.

20683057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20683057 is about 4547.8629047059. The cubic root of 20683057 is about 274.4974048724.

The spelling of 20683057 in words is "twenty million, six hundred eighty-three thousand, fifty-seven".