20009306 has 8 divisors (see below), whose sum is σ = 31779540. Its totient is φ = 9416128.

The previous prime is 20009293. The next prime is 20009329. The reversal of 20009306 is 60390002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19439281 + 570025 = 4409^2 + 755^2 .

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

It is an unprimeable number.

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, 294221 + ... + 294288.

Almost surely, 2^20009306 is an apocalyptic number.

20009306 is a deficient number, since it is larger than the sum of its proper divisors (11770234).

20009306 is a wasteful number, since it uses less digits than its factorization.

20009306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588528.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20009306 is about 4473.1762764282. The cubic root of 20009306 is about 271.4838557486.

Adding to 20009306 its reverse (60390002), we get a palindrome (80399308).

The spelling of 20009306 in words is "twenty million, nine thousand, three hundred six".