20330647 has 2 divisors, whose sum is σ = 20330648. Its totient is φ = 20330646.

The previous prime is 20330591. The next prime is 20330671. The reversal of 20330647 is 74603302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20330647 - 2²³ = 11942039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20330677) 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 as a sum of consecutive naturals, namely, 10165323 + 10165324.

It is an arithmetic number, because the mean of its divisors is an integer number (10165324).

Almost surely, 2^20330647 is an apocalyptic number.

20330647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330647 is an equidigital number, since it uses as much as digits as its factorization.

20330647 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 25.

The square root of 20330647 is about 4508.9518737729. The cubic root of 20330647 is about 272.9294499409.

Adding to 20330647 its reverse (74603302), we get a palindrome (94933949).

The spelling of 20330647 in words is "twenty million, three hundred thirty thousand, six hundred forty-seven".