20305079 has 2 divisors, whose sum is σ = 20305080. Its totient is φ = 20305078.

The previous prime is 20305063. The next prime is 20305097. The reversal of 20305079 is 97050302.

Together with next prime (20305097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20305079 - 2⁴ = 20305063 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20305039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10152539 + 10152540.

It is an arithmetic number, because the mean of its divisors is an integer number (10152540).

Almost surely, 2^20305079 is an apocalyptic number.

20305079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20305079 is an equidigital number, since it uses as much as digits as its factorization.

20305079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 20305079 is about 4506.1157330899. The cubic root of 20305079 is about 272.8149891217.

The spelling of 20305079 in words is "twenty million, three hundred five thousand, seventy-nine".