18874417198 has 24 divisors (see below), whose sum is σ = 35036538768. Its totient is φ = 7466801472.

The previous prime is 18874417193. The next prime is 18874417241. The reversal of 18874417198 is 89171447881.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18874417193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3986311 + ... + 3991042.

It is an arithmetic number, because the mean of its divisors is an integer number (1459855782).

Almost surely, 2^18874417198 is an apocalyptic number.

18874417198 is a deficient number, since it is larger than the sum of its proper divisors (16162121570).

18874417198 is a wasteful number, since it uses less digits than its factorization.

18874417198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7977388 (or 7977375 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 58.

The spelling of 18874417198 in words is "eighteen billion, eight hundred seventy-four million, four hundred seventeen thousand, one hundred ninety-eight".