18683198 has 4 divisors (see below), whose sum is σ = 28024800. Its totient is φ = 9341598.

The previous prime is 18683191. The next prime is 18683201. The reversal of 18683198 is 89138681.

It is a happy number.

18683198 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89138681 = 1483 ⋅60107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18683191) 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 as a sum of consecutive naturals, namely, 4670798 + ... + 4670801.

It is an arithmetic number, because the mean of its divisors is an integer number (7006200).

Almost surely, 2^18683198 is an apocalyptic number.

18683198 is a deficient number, since it is larger than the sum of its proper divisors (9341602).

18683198 is an equidigital number, since it uses as much as digits as its factorization.

18683198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341601.

The product of its digits is 82944, while the sum is 44.

The square root of 18683198 is about 4322.4065056401. The cubic root of 18683198 is about 265.3487658984.

It can be divided in two parts, 18683 and 198, that added together give a palindrome (18881).

The spelling of 18683198 in words is "eighteen million, six hundred eighty-three thousand, one hundred ninety-eight".