20965193 has 2 divisors, whose sum is σ = 20965194. Its totient is φ = 20965192.

The previous prime is 20965183. The next prime is 20965249. The reversal of 20965193 is 39156902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 10259209 = 3272^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 20965193 - 2¹⁰ = 20964169 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20965183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10482596 + 10482597.

It is an arithmetic number, because the mean of its divisors is an integer number (10482597).

Almost surely, 2^20965193 is an apocalyptic number.

It is an amenable number.

20965193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20965193 is an equidigital number, since it uses as much as digits as its factorization.

20965193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 20965193 is about 4578.7763649255. The cubic root of 20965193 is about 275.7399049739.

The spelling of 20965193 in words is "twenty million, nine hundred sixty-five thousand, one hundred ninety-three".