20670959 has 2 divisors, whose sum is σ = 20670960. Its totient is φ = 20670958.

The previous prime is 20670943. The next prime is 20670983. The reversal of 20670959 is 95907602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20670959 - 2⁴ = 20670943 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20670989) 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, 10335479 + 10335480.

It is an arithmetic number, because the mean of its divisors is an integer number (10335480).

Almost surely, 2^20670959 is an apocalyptic number.

20670959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670959 is an equidigital number, since it uses as much as digits as its factorization.

20670959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 20670959 is about 4546.5326348768. The cubic root of 20670959 is about 274.4438744666.

The spelling of 20670959 in words is "twenty million, six hundred seventy thousand, nine hundred fifty-nine".