18680983 has 4 divisors (see below), whose sum is σ = 18694368. Its totient is φ = 18667600.

The previous prime is 18680929. The next prime is 18680989. The reversal of 18680983 is 38908681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18680983 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 (18680989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4318 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (4673592).

Almost surely, 2^18680983 is an apocalyptic number.

18680983 is a deficient number, since it is larger than the sum of its proper divisors (13385).

18680983 is a wasteful number, since it uses less digits than its factorization.

18680983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13384.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18680983 is about 4322.1502750367. The cubic root of 18680983 is about 265.3382792793.

The spelling of 18680983 in words is "eighteen million, six hundred eighty thousand, nine hundred eighty-three".