20113312003 has 4 divisors (see below), whose sum is σ = 20312453808. Its totient is φ = 19914170200.

The previous prime is 20113311997. The next prime is 20113312033. The reversal of 20113312003 is 30021331102.

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 20113312003 - 2¹³ = 20113303811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113312033) 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, 99570751 + ... + 99570952.

It is an arithmetic number, because the mean of its divisors is an integer number (5078113452).

Almost surely, 2^20113312003 is an apocalyptic number.

20113312003 is a deficient number, since it is larger than the sum of its proper divisors (199141805).

20113312003 is a wasteful number, since it uses less digits than its factorization.

20113312003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199141804.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20113312003 its reverse (30021331102), we get a palindrome (50134643105).

The spelling of 20113312003 in words is "twenty billion, one hundred thirteen million, three hundred twelve thousand, three".