20330771 has 2 divisors, whose sum is σ = 20330772. Its totient is φ = 20330770.

The previous prime is 20330753. The next prime is 20330773. The reversal of 20330771 is 17703302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20330771 is a prime.

Together with 20330773, 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 (20330773) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165385 + 10165386.

It is an arithmetic number, because the mean of its divisors is an integer number (10165386).

Almost surely, 2^20330771 is an apocalyptic number.

20330771 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330771 is an equidigital number, since it uses as much as digits as its factorization.

20330771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 20330771 is about 4508.9656241759. The cubic root of 20330771 is about 272.9300048205.

The spelling of 20330771 in words is "twenty million, three hundred thirty thousand, seven hundred seventy-one".