18939683 has 8 divisors (see below), whose sum is σ = 22918752. Its totient is φ = 15278976.

The previous prime is 18939677. The next prime is 18939689. The reversal of 18939683 is 38693981.

It is an interprime number because it is at equal distance from previous prime (18939677) and next prime (18939689).

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 18939683 - 2¹⁶ = 18874147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18939689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79460 + ... + 79697.

It is an arithmetic number, because the mean of its divisors is an integer number (2864844).

Almost surely, 2^18939683 is an apocalyptic number.

18939683 is a deficient number, since it is larger than the sum of its proper divisors (3979069).

18939683 is a wasteful number, since it uses less digits than its factorization.

18939683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159181.

The product of its digits is 279936, while the sum is 47.

The square root of 18939683 is about 4351.9746093009. The cubic root of 18939683 is about 266.5574971539.

The spelling of 18939683 in words is "eighteen million, nine hundred thirty-nine thousand, six hundred eighty-three".