18396983 has 4 divisors (see below), whose sum is σ = 20069448. Its totient is φ = 16724520.

The previous prime is 18396979. The next prime is 18397003. The reversal of 18396983 is 38969381.

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

It is a cyclic number.

It is not a de Polignac number, because 18396983 - 2² = 18396979 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 (18396083) 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, 836216 + ... + 836237.

It is an arithmetic number, because the mean of its divisors is an integer number (5017362).

Almost surely, 2^18396983 is an apocalyptic number.

18396983 is a deficient number, since it is larger than the sum of its proper divisors (1672465).

18396983 is a wasteful number, since it uses less digits than its factorization.

18396983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672464.

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

The square root of 18396983 is about 4289.1704326128. The cubic root of 18396983 is about 263.9867943731.

The spelling of 18396983 in words is "eighteen million, three hundred ninety-six thousand, nine hundred eighty-three".