20316347 has 2 divisors, whose sum is σ = 20316348. Its totient is φ = 20316346.

The previous prime is 20316341. The next prime is 20316389. The reversal of 20316347 is 74361302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20316347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20316341) 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 as a sum of consecutive naturals, namely, 10158173 + 10158174.

It is an arithmetic number, because the mean of its divisors is an integer number (10158174).

Almost surely, 2^20316347 is an apocalyptic number.

20316347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20316347 is an equidigital number, since it uses as much as digits as its factorization.

20316347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20316347 is about 4507.3658604555. The cubic root of 20316347 is about 272.8654446561.

Adding to 20316347 its reverse (74361302), we get a palindrome (94677649).

The spelling of 20316347 in words is "twenty million, three hundred sixteen thousand, three hundred forty-seven".