20103243005 has 4 divisors (see below), whose sum is σ = 24123891612. Its totient is φ = 16082594400.

The previous prime is 20103242941. The next prime is 20103243007. The reversal of 20103243005 is 50034230102.

It is a happy number.

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 11347149529 + 8756093476 = 106523^2 + 93574^2 .

It is not a de Polignac number, because 20103243005 - 2⁶ = 20103242941 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 (20103243007) 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, 2010324296 + ... + 2010324305.

It is an arithmetic number, because the mean of its divisors is an integer number (6030972903).

Almost surely, 2^20103243005 is an apocalyptic number.

It is an amenable number.

20103243005 is a deficient number, since it is larger than the sum of its proper divisors (4020648607).

20103243005 is an equidigital number, since it uses as much as digits as its factorization.

20103243005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020648606.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 20103243005 its reverse (50034230102), we get a palindrome (70137473107).

The spelling of 20103243005 in words is "twenty billion, one hundred three million, two hundred forty-three thousand, five".