18708845 has 8 divisors (see below), whose sum is σ = 22649976. Its totient is φ = 14834176.

The previous prime is 18708839. The next prime is 18708853. The reversal of 18708845 is 54880781.

18708845 = 3058² + 3059².

It can be written as a sum of positive squares in 4 ways, for example, as 373321 + 18335524 = 611^2 + 4282^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18708845 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15992 + ... + 17121.

It is an arithmetic number, because the mean of its divisors is an integer number (2831247).

Almost surely, 2^18708845 is an apocalyptic number.

18708845 is the 3059-th centered square number.

It is an amenable number.

18708845 is a deficient number, since it is larger than the sum of its proper divisors (3941131).

18708845 is a wasteful number, since it uses less digits than its factorization.

18708845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33231.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 18708845 is about 4325.3722383166. The cubic root of 18708845 is about 265.4701278511.

The spelling of 18708845 in words is "eighteen million, seven hundred eight thousand, eight hundred forty-five".