20106193 has 4 divisors (see below), whose sum is σ = 20799540. Its totient is φ = 19412848.

The previous prime is 20106187. The next prime is 20106217. The reversal of 20106193 is 39160102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13046544 + 7059649 = 3612^2 + 2657^2 .

It is a cyclic number.

It is not a de Polignac number, because 20106193 - 2⁹ = 20105681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20106143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346630 + ... + 346687.

It is an arithmetic number, because the mean of its divisors is an integer number (5199885).

Almost surely, 2^20106193 is an apocalyptic number.

It is an amenable number.

20106193 is a deficient number, since it is larger than the sum of its proper divisors (693347).

20106193 is an equidigital number, since it uses as much as digits as its factorization.

20106193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693346.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20106193 is about 4483.9929750168. The cubic root of 20106193 is about 271.9213341210.

Adding to 20106193 its reverse (39160102), we get a palindrome (59266295).

The spelling of 20106193 in words is "twenty million, one hundred six thousand, one hundred ninety-three".