20670613856279 has 2 divisors, whose sum is σ = 20670613856280. Its totient is φ = 20670613856278.

The previous prime is 20670613856203. The next prime is 20670613856303. The reversal of 20670613856279 is 97265831607602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20670613856279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20670613856779) 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, 10335306928139 + 10335306928140.

It is an arithmetic number, because the mean of its divisors is an integer number (10335306928140).

Almost surely, 2^{20670613856279} is an apocalyptic number.

20670613856279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670613856279 is an equidigital number, since it uses as much as digits as its factorization.

20670613856279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 62.

The spelling of 20670613856279 in words is "twenty trillion, six hundred seventy billion, six hundred thirteen million, eight hundred fifty-six thousand, two hundred seventy-nine".