20716273 has 2 divisors, whose sum is σ = 20716274. Its totient is φ = 20716272.

The previous prime is 20716253. The next prime is 20716279. The reversal of 20716273 is 37261702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13490929 + 7225344 = 3673^2 + 2688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20716273 is a prime.

It is not a weakly prime, because it can be changed into another prime (20716279) 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, 10358136 + 10358137.

It is an arithmetic number, because the mean of its divisors is an integer number (10358137).

Almost surely, 2^20716273 is an apocalyptic number.

It is an amenable number.

20716273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20716273 is an equidigital number, since it uses as much as digits as its factorization.

20716273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 20716273 is about 4551.5132648384. The cubic root of 20716273 is about 274.6442695144.

Adding to 20716273 its reverse (37261702), we get a palindrome (57977975).

It can be divided in two parts, 2071627 and 3, that added together give a triangular number (2071630 = T₂₀₃₅).

The spelling of 20716273 in words is "twenty million, seven hundred sixteen thousand, two hundred seventy-three".