20045320103 has 4 divisors (see below), whose sum is σ = 20047606008. Its totient is φ = 20043034200.

The previous prime is 20045320079. The next prime is 20045320147. The reversal of 20045320103 is 30102354002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20045320103 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 (20045320303) 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, 1129748 + ... + 1147353.

It is an arithmetic number, because the mean of its divisors is an integer number (5011901502).

Almost surely, 2^20045320103 is an apocalyptic number.

20045320103 is a deficient number, since it is larger than the sum of its proper divisors (2285905).

20045320103 is an equidigital number, since it uses as much as digits as its factorization.

20045320103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285904.

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

Adding to 20045320103 its reverse (30102354002), we get a palindrome (50147674105).

The spelling of 20045320103 in words is "twenty billion, forty-five million, three hundred twenty thousand, one hundred three".