20650306 has 8 divisors (see below), whose sum is σ = 31731084. Its totient is φ = 10073280.

The previous prime is 20650303. The next prime is 20650319. The reversal of 20650306 is 60305602.

It can be written as a sum of positive squares in 2 ways, for example, as 20331081 + 319225 = 4509^2 + 565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20650303) 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 3 ways as a sum of consecutive naturals, for example, 125835 + ... + 125998.

Almost surely, 2^20650306 is an apocalyptic number.

20650306 is a deficient number, since it is larger than the sum of its proper divisors (11080778).

20650306 is a wasteful number, since it uses less digits than its factorization.

20650306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251876.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20650306 is about 4544.2607759679. The cubic root of 20650306 is about 274.3524421967.

Adding to 20650306 its reverse (60305602), we get a palindrome (80955908).

The spelling of 20650306 in words is "twenty million, six hundred fifty thousand, three hundred six".