20306097 has 12 divisors (see below), whose sum is σ = 33521280. Its totient is φ = 11603448.

The previous prime is 20306063. The next prime is 20306113. The reversal of 20306097 is 79060302.

20306097 is a `hidden beast` number, since 20 + 30 + 609 + 7 = 666.

It is not a de Polignac number, because 20306097 - 2⁷ = 20305969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20306097.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306017) 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 11 ways as a sum of consecutive naturals, for example, 161097 + ... + 161222.

It is an arithmetic number, because the mean of its divisors is an integer number (2793440).

Almost surely, 2^20306097 is an apocalyptic number.

It is an amenable number.

20306097 is a deficient number, since it is larger than the sum of its proper divisors (13215183).

20306097 is a wasteful number, since it uses less digits than its factorization.

20306097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322332 (or 322329 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20306097 is about 4506.2286892700. The cubic root of 20306097 is about 272.8195482605.

Adding to 20306097 its reverse (79060302), we get a palindrome (99366399).

The spelling of 20306097 in words is "twenty million, three hundred six thousand, ninety-seven".