18458109 has 12 divisors (see below), whose sum is σ = 26759616. Its totient is φ = 12260232.

The previous prime is 18458093. The next prime is 18458117. The reversal of 18458109 is 90185481.

It is not a de Polignac number, because 18458109 - 2⁴ = 18458093 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18458119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1077 + ... + 6170.

It is an arithmetic number, because the mean of its divisors is an integer number (2229968).

Almost surely, 2^18458109 is an apocalyptic number.

It is an amenable number.

18458109 is a deficient number, since it is larger than the sum of its proper divisors (8301507).

18458109 is a wasteful number, since it uses less digits than its factorization.

18458109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536 (or 7533 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 18458109 is about 4296.2901438334. The cubic root of 18458109 is about 264.2788462092.

The spelling of 18458109 in words is "eighteen million, four hundred fifty-eight thousand, one hundred nine".