20816701 has 2 divisors, whose sum is σ = 20816702. Its totient is φ = 20816700.

The previous prime is 20816689. The next prime is 20816759. The reversal of 20816701 is 10761802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16402500 + 4414201 = 4050^2 + 2101^2 .

It is a cyclic number.

It is not a de Polignac number, because 20816701 - 2⁵ = 20816669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20816791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10408350 + 10408351.

It is an arithmetic number, because the mean of its divisors is an integer number (10408351).

Almost surely, 2^20816701 is an apocalyptic number.

It is an amenable number.

20816701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20816701 is an equidigital number, since it uses as much as digits as its factorization.

20816701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 20816701 is about 4562.5323012555. The cubic root of 20816701 is about 275.0873595733.

The spelling of 20816701 in words is "twenty million, eight hundred sixteen thousand, seven hundred one".