20109703 has 4 divisors (see below), whose sum is σ = 20198520. Its totient is φ = 20020888.

The previous prime is 20109667. The next prime is 20109707. The reversal of 20109703 is 30790102.

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

It is a cyclic number.

It is not a de Polignac number, because 20109703 - 2⁹ = 20109191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20109707) 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, 44068 + ... + 44521.

It is an arithmetic number, because the mean of its divisors is an integer number (5049630).

Almost surely, 2^20109703 is an apocalyptic number.

20109703 is a deficient number, since it is larger than the sum of its proper divisors (88817).

20109703 is an equidigital number, since it uses as much as digits as its factorization.

20109703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88816.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 20109703 is about 4484.3843501645. The cubic root of 20109703 is about 271.9371565817.

Adding to 20109703 its reverse (30790102), we get a palindrome (50899805).

The spelling of 20109703 in words is "twenty million, one hundred nine thousand, seven hundred three".