20676912479 has 2 divisors, whose sum is σ = 20676912480. Its totient is φ = 20676912478.

The previous prime is 20676912463. The next prime is 20676912497. The reversal of 20676912479 is 97421967602.

Together with next prime (20676912497) 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 20676912479 - 2⁴ = 20676912463 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20676912479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20676912379) 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, 10338456239 + 10338456240.

It is an arithmetic number, because the mean of its divisors is an integer number (10338456240).

Almost surely, 2^20676912479 is an apocalyptic number.

20676912479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20676912479 is an equidigital number, since it uses as much as digits as its factorization.

20676912479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 20676912479 in words is "twenty billion, six hundred seventy-six million, nine hundred twelve thousand, four hundred seventy-nine".