18195840098 has 64 divisors (see below), whose sum is σ = 29968081920. Its totient is φ = 8265868800.

The previous prime is 18195840097. The next prime is 18195840119. The reversal of 18195840098 is 89004859181.

It is a happy number.

It is a super-4 number, since 4×18195840098⁴ (a number of 42 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18195840097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7934240 + ... + 7936532.

It is an arithmetic number, because the mean of its divisors is an integer number (468251280).

Almost surely, 2^18195840098 is an apocalyptic number.

18195840098 is a deficient number, since it is larger than the sum of its proper divisors (11772241822).

18195840098 is a wasteful number, since it uses less digits than its factorization.

18195840098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483.

The product of its (nonzero) digits is 829440, while the sum is 53.

The spelling of 18195840098 in words is "eighteen billion, one hundred ninety-five million, eight hundred forty thousand, ninety-eight".