18982857 has 8 divisors (see below), whose sum is σ = 25495776. Its totient is φ = 12562592.

The previous prime is 18982853. The next prime is 18982867. The reversal of 18982857 is 75828981.

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 18982857 - 2² = 18982853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18982853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22683 + ... + 23504.

It is an arithmetic number, because the mean of its divisors is an integer number (3186972).

Almost surely, 2^18982857 is an apocalyptic number.

It is an amenable number.

18982857 is a deficient number, since it is larger than the sum of its proper divisors (6512919).

18982857 is a wasteful number, since it uses less digits than its factorization.

18982857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46327.

The product of its digits is 322560, while the sum is 48.

The square root of 18982857 is about 4356.9320628167. The cubic root of 18982857 is about 266.7598873736.

The spelling of 18982857 in words is "eighteen million, nine hundred eighty-two thousand, eight hundred fifty-seven".