20850713 has 6 divisors (see below), whose sum is σ = 22578174. Its totient is φ = 19246656.

The previous prime is 20850703. The next prime is 20850737. The reversal of 20850713 is 31705802.

It can be written as a sum of positive squares in 3 ways, for example, as 753424 + 20097289 = 868^2 + 4483^2 .

It is not a de Polignac number, because 20850713 - 2⁶ = 20850649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61520 + ... + 61857.

It is an arithmetic number, because the mean of its divisors is an integer number (3763029).

Almost surely, 2^20850713 is an apocalyptic number.

It is an amenable number.

20850713 is a deficient number, since it is larger than the sum of its proper divisors (1727461).

20850713 is a wasteful number, since it uses less digits than its factorization.

20850713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123403 (or 123390 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20850713 is about 4566.2580960782. The cubic root of 20850713 is about 275.2370980007.

The spelling of 20850713 in words is "twenty million, eight hundred fifty thousand, seven hundred thirteen".