18839906 has 8 divisors (see below), whose sum is σ = 29747280. Its totient is φ = 8924148.

The previous prime is 18839867. The next prime is 18839917. The reversal of 18839906 is 60993881.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247856 + ... + 247931.

It is an arithmetic number, because the mean of its divisors is an integer number (3718410).

Almost surely, 2^18839906 is an apocalyptic number.

18839906 is a deficient number, since it is larger than the sum of its proper divisors (10907374).

18839906 is a wasteful number, since it uses less digits than its factorization.

18839906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495808.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 18839906 is about 4340.4960546002. The cubic root of 18839906 is about 266.0885848888.

The spelling of 18839906 in words is "eighteen million, eight hundred thirty-nine thousand, nine hundred six".