18713109 has 8 divisors (see below), whose sum is σ = 25002432. Its totient is φ = 12449600.

The previous prime is 18713027. The next prime is 18713113. The reversal of 18713109 is 90131781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18713109 - 2²⁴ = 1935893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18713129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4692 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (3125304).

Almost surely, 2^18713109 is an apocalyptic number.

It is an amenable number.

18713109 is a deficient number, since it is larger than the sum of its proper divisors (6289323).

18713109 is a wasteful number, since it uses less digits than its factorization.

18713109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12907.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 18713109 is about 4325.8651157890. The cubic root of 18713109 is about 265.4902944023.

The spelling of 18713109 in words is "eighteen million, seven hundred thirteen thousand, one hundred nine".