20303147 has 2 divisors, whose sum is σ = 20303148. Its totient is φ = 20303146.

The previous prime is 20303141. The next prime is 20303149. The reversal of 20303147 is 74130302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20303147 - 2¹⁶ = 20237611 is a prime.

Together with 20303149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20303141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151573 + 10151574.

It is an arithmetic number, because the mean of its divisors is an integer number (10151574).

Almost surely, 2^20303147 is an apocalyptic number.

20303147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303147 is an equidigital number, since it uses as much as digits as its factorization.

20303147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20303147 is about 4505.9013526707. The cubic root of 20303147 is about 272.8063361918.

Adding to 20303147 its reverse (74130302), we get a palindrome (94433449).

The spelling of 20303147 in words is "twenty million, three hundred three thousand, one hundred forty-seven".