20696911 has 2 divisors, whose sum is σ = 20696912. Its totient is φ = 20696910.

The previous prime is 20696881. The next prime is 20696953. The reversal of 20696911 is 11969602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20696911 - 2⁹ = 20696399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20696971) 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, 10348455 + 10348456.

It is an arithmetic number, because the mean of its divisors is an integer number (10348456).

Almost surely, 2^20696911 is an apocalyptic number.

20696911 is a deficient number, since it is larger than the sum of its proper divisors (1).

20696911 is an equidigital number, since it uses as much as digits as its factorization.

20696911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 20696911 is about 4549.3857827184. The cubic root of 20696911 is about 274.5586794747.

The spelling of 20696911 in words is "twenty million, six hundred ninety-six thousand, nine hundred eleven".