20968117 has 2 divisors, whose sum is σ = 20968118. Its totient is φ = 20968116.

The previous prime is 20968109. The next prime is 20968127. The reversal of 20968117 is 71186902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 10150596 = 3289^2 + 3186^2 .

It is a cyclic number.

It is not a de Polignac number, because 20968117 - 2³ = 20968109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20968127) 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, 10484058 + 10484059.

It is an arithmetic number, because the mean of its divisors is an integer number (10484059).

Almost surely, 2^20968117 is an apocalyptic number.

It is an amenable number.

20968117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20968117 is an equidigital number, since it uses as much as digits as its factorization.

20968117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 20968117 is about 4579.0956530739. The cubic root of 20968117 is about 275.7527234584.

The spelling of 20968117 in words is "twenty million, nine hundred sixty-eight thousand, one hundred seventeen".