20716250 has 20 divisors (see below), whose sum is σ = 38832882. Its totient is φ = 8286000.

The previous prime is 20716243. The next prime is 20716253. The reversal of 20716250 is 5261702.

It can be written as a sum of positive squares in 5 ways, for example, as 833569 + 19882681 = 913^2 + 4459^2 .

It is not an unprimeable number, because it can be changed into a prime (20716253) 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 in 9 ways as a sum of consecutive naturals, for example, 7037 + ... + 9536.

Almost surely, 2^20716250 is an apocalyptic number.

20716250 is a deficient number, since it is larger than the sum of its proper divisors (18116632).

20716250 is an equidigital number, since it uses as much as digits as its factorization.

20716250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16595 (or 16580 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20716250 is about 4551.5107382055. The cubic root of 20716250 is about 274.6441678741.

Adding to 20716250 its reverse (5261702), we get a palindrome (25977952).

The spelling of 20716250 in words is "twenty million, seven hundred sixteen thousand, two hundred fifty".