16855000203 has 4 divisors (see below), whose sum is σ = 22473333608. Its totient is φ = 11236666800.

The previous prime is 16855000157. The next prime is 16855000213. The reversal of 16855000203 is 30200055861.

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

It is not a de Polignac number, because 16855000203 - 2²⁶ = 16787891339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16855000213) 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, 2809166698 + ... + 2809166703.

It is an arithmetic number, because the mean of its divisors is an integer number (5618333402).

Almost surely, 2^16855000203 is an apocalyptic number.

16855000203 is a deficient number, since it is larger than the sum of its proper divisors (5618333405).

16855000203 is an equidigital number, since it uses as much as digits as its factorization.

16855000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618333404.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 16855000203 in words is "sixteen billion, eight hundred fifty-five million, two hundred three", and thus it is an aban number.