20674056289 has 2 divisors, whose sum is σ = 20674056290. Its totient is φ = 20674056288.

The previous prime is 20674056281. The next prime is 20674056317. The reversal of 20674056289 is 98265047602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15173312400 + 5500743889 = 123180^2 + 74167^2 .

It is a cyclic number.

It is not a de Polignac number, because 20674056289 - 2³ = 20674056281 is a prime.

It is not a weakly prime, because it can be changed into another prime (20674056281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337028144 + 10337028145.

It is an arithmetic number, because the mean of its divisors is an integer number (10337028145).

Almost surely, 2^20674056289 is an apocalyptic number.

It is an amenable number.

20674056289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20674056289 is an equidigital number, since it uses as much as digits as its factorization.

20674056289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 20674056289 in words is "twenty billion, six hundred seventy-four million, fifty-six thousand, two hundred eighty-nine".