20773966439 has 2 divisors, whose sum is σ = 20773966440. Its totient is φ = 20773966438.

The previous prime is 20773966403. The next prime is 20773966529. The reversal of 20773966439 is 93466937702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20773966439 - 2³² = 16478999143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20773966039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10386983219 + 10386983220.

It is an arithmetic number, because the mean of its divisors is an integer number (10386983220).

Almost surely, 2^20773966439 is an apocalyptic number.

20773966439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20773966439 is an equidigital number, since it uses as much as digits as its factorization.

20773966439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 56.

The spelling of 20773966439 in words is "twenty billion, seven hundred seventy-three million, nine hundred sixty-six thousand, four hundred thirty-nine".