18703909305 has 48 divisors (see below), whose sum is σ = 33215719680. Its totient is φ = 9731199744.

The previous prime is 18703909247. The next prime is 18703909313. The reversal of 18703909305 is 50390930781.

It is a happy number.

It is not a de Polignac number, because 18703909305 - 2⁷ = 18703909177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1652656 + ... + 1663934.

It is an arithmetic number, because the mean of its divisors is an integer number (691994160).

Almost surely, 2^18703909305 is an apocalyptic number.

18703909305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18703909305 is a deficient number, since it is larger than the sum of its proper divisors (14511810375).

18703909305 is a wasteful number, since it uses less digits than its factorization.

18703909305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12190 (or 12187 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 18703909305 in words is "eighteen billion, seven hundred three million, nine hundred nine thousand, three hundred five".