2101813803 has 6 divisors (see below), whose sum is σ = 3035953284. Its totient is φ = 1401209196.

The previous prime is 2101813799. The next prime is 2101813829. The reversal of 2101813803 is 3083181012.

2101813803 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2101813803 - 2² = 2101813799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101813303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116767425 + ... + 116767442.

It is an arithmetic number, because the mean of its divisors is an integer number (505992214).

Almost surely, 2^2101813803 is an apocalyptic number.

2101813803 is a deficient number, since it is larger than the sum of its proper divisors (934139481).

2101813803 is a wasteful number, since it uses less digits than its factorization.

2101813803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233534873 (or 233534870 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2101813803 is about 45845.5428913215. The cubic root of 2101813803 is about 1280.9477443413.

Adding to 2101813803 its reverse (3083181012), we get a palindrome (5184994815).

The spelling of 2101813803 in words is "two billion, one hundred one million, eight hundred thirteen thousand, eight hundred three".