20773679 has 2 divisors, whose sum is σ = 20773680. Its totient is φ = 20773678.

The previous prime is 20773663. The next prime is 20773681. The reversal of 20773679 is 97637702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20773679 - 2⁴ = 20773663 is a prime.

Together with 20773681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20773699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10386839 + 10386840.

It is an arithmetic number, because the mean of its divisors is an integer number (10386840).

Almost surely, 2^20773679 is an apocalyptic number.

20773679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20773679 is an equidigital number, since it uses as much as digits as its factorization.

20773679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 20773679 is about 4557.8151564099. The cubic root of 20773679 is about 274.8977206422.

The spelling of 20773679 in words is "twenty million, seven hundred seventy-three thousand, six hundred seventy-nine".