18730434903 has 4 divisors (see below), whose sum is σ = 24973913208. Its totient is φ = 12486956600.

The previous prime is 18730434871. The next prime is 18730434917. The reversal of 18730434903 is 30943403781.

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 18730434903 - 2⁵ = 18730434871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730434703) 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, 3121739148 + ... + 3121739153.

It is an arithmetic number, because the mean of its divisors is an integer number (6243478302).

Almost surely, 2^18730434903 is an apocalyptic number.

18730434903 is a deficient number, since it is larger than the sum of its proper divisors (6243478305).

18730434903 is an equidigital number, since it uses as much as digits as its factorization.

18730434903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243478304.

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 18730434903 in words is "eighteen billion, seven hundred thirty million, four hundred thirty-four thousand, nine hundred three".