20671073 has 2 divisors, whose sum is σ = 20671074. Its totient is φ = 20671072.

The previous prime is 20671033. The next prime is 20671081. The reversal of 20671073 is 37017602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14992384 + 5678689 = 3872^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 20671073 - 2⁸ = 20670817 is a prime.

It is not a weakly prime, because it can be changed into another prime (20671033) 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, 10335536 + 10335537.

It is an arithmetic number, because the mean of its divisors is an integer number (10335537).

Almost surely, 2^20671073 is an apocalyptic number.

It is an amenable number.

20671073 is a deficient number, since it is larger than the sum of its proper divisors (1).

20671073 is an equidigital number, since it uses as much as digits as its factorization.

20671073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 20671073 is about 4546.5451718860. The cubic root of 20671073 is about 274.4443789835. Note that the first 3 decimals are identical.

Adding to 20671073 its reverse (37017602), we get a palindrome (57688675).

The spelling of 20671073 in words is "twenty million, six hundred seventy-one thousand, seventy-three".