20306606 has 4 divisors (see below), whose sum is σ = 30459912. Its totient is φ = 10153302.

The previous prime is 20306597. The next prime is 20306617. The reversal of 20306606 is 60660302.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5076650 + ... + 5076653.

It is an arithmetic number, because the mean of its divisors is an integer number (7614978).

Almost surely, 2^20306606 is an apocalyptic number.

20306606 is a deficient number, since it is larger than the sum of its proper divisors (10153306).

20306606 is a wasteful number, since it uses less digits than its factorization.

20306606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153305.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20306606 is about 4506.2851662983. The cubic root of 20306606 is about 272.8218277727.

Adding to 20306606 its reverse (60660302), we get a palindrome (80966908).

The spelling of 20306606 in words is "twenty million, three hundred six thousand, six hundred six".