20109003 has 4 divisors (see below), whose sum is σ = 26812008. Its totient is φ = 13406000.

The previous prime is 20108989. The next prime is 20109007. The reversal of 20109003 is 30090102.

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 20109003 - 2⁶ = 20108939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20109007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351498 + ... + 3351503.

It is an arithmetic number, because the mean of its divisors is an integer number (6703002).

Almost surely, 2^20109003 is an apocalyptic number.

20109003 is a deficient number, since it is larger than the sum of its proper divisors (6703005).

20109003 is an equidigital number, since it uses as much as digits as its factorization.

20109003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703004.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 20109003 is about 4484.3063008675. The cubic root of 20109003 is about 271.9340012522.

Adding to 20109003 its reverse (30090102), we get a palindrome (50199105).

The spelling of 20109003 in words is "twenty million, one hundred nine thousand, three".