18193840203 has 64 divisors (see below), whose sum is σ = 31874273280. Its totient is φ = 8943177600.

The previous prime is 18193840193. The next prime is 18193840237. The reversal of 18193840203 is 30204839181.

It is not a de Polignac number, because 18193840203 - 2⁴ = 18193840187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18193840003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4654776 + ... + 4658682.

It is an arithmetic number, because the mean of its divisors is an integer number (498035520).

Almost surely, 2^18193840203 is an apocalyptic number.

18193840203 is a deficient number, since it is larger than the sum of its proper divisors (13680433077).

18193840203 is a wasteful number, since it uses less digits than its factorization.

18193840203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 18193840203 in words is "eighteen billion, one hundred ninety-three million, eight hundred forty thousand, two hundred three".