18708349 has 4 divisors (see below), whose sum is σ = 20409120. Its totient is φ = 17007580.

The previous prime is 18708337. The next prime is 18708353. The reversal of 18708349 is 94380781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94380781 = 11 ⋅8580071.

It is a cyclic number.

It is not a de Polignac number, because 18708349 - 2¹¹ = 18706301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18708329) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 850369 + ... + 850390.

It is an arithmetic number, because the mean of its divisors is an integer number (5102280).

Almost surely, 2^18708349 is an apocalyptic number.

It is an amenable number.

18708349 is a deficient number, since it is larger than the sum of its proper divisors (1700771).

18708349 is a wasteful number, since it uses less digits than its factorization.

18708349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700770.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 18708349 is about 4325.3149018308. The cubic root of 18708349 is about 265.4677818245.

The spelling of 18708349 in words is "eighteen million, seven hundred eight thousand, three hundred forty-nine".