18824198 has 4 divisors (see below), whose sum is σ = 28236300. Its totient is φ = 9412098.

The previous prime is 18824171. The next prime is 18824203. The reversal of 18824198 is 89142881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89142881 = 1399 ⋅63719.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4706048 + ... + 4706051.

It is an arithmetic number, because the mean of its divisors is an integer number (7059075).

Almost surely, 2^18824198 is an apocalyptic number.

18824198 is a deficient number, since it is larger than the sum of its proper divisors (9412102).

18824198 is an equidigital number, since it uses as much as digits as its factorization.

18824198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412101.

The product of its digits is 36864, while the sum is 41.

The square root of 18824198 is about 4338.6862066759. The cubic root of 18824198 is about 266.0146127989.

The spelling of 18824198 in words is "eighteen million, eight hundred twenty-four thousand, one hundred ninety-eight".