20620679 has 2 divisors, whose sum is σ = 20620680. Its totient is φ = 20620678.

The previous prime is 20620669. The next prime is 20620687. The reversal of 20620679 is 97602602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20620679 - 2⁸ = 20620423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620619) 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, 10310339 + 10310340.

It is an arithmetic number, because the mean of its divisors is an integer number (10310340).

Almost surely, 2^20620679 is an apocalyptic number.

20620679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620679 is an equidigital number, since it uses as much as digits as its factorization.

20620679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20620679 is about 4540.9997797842. Note that the first 3 decimals coincide. The cubic root of 20620679 is about 274.2211748908.

The spelling of 20620679 in words is "twenty million, six hundred twenty thousand, six hundred seventy-nine".