18910999098 has 64 divisors (see below), whose sum is σ = 44481091200. Its totient is φ = 5938842240.

The previous prime is 18910999097. The next prime is 18910999103. The reversal of 18910999098 is 89099901981.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18910999097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134790 + ... + 236622.

It is an arithmetic number, because the mean of its divisors is an integer number (695017050).

Almost surely, 2^18910999098 is an apocalyptic number.

18910999098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18910999098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22240545600).

18910999098 is an abundant number, since it is smaller than the sum of its proper divisors (25570092102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18910999098 is a wasteful number, since it uses less digits than its factorization.

18910999098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102044 (or 102038 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 63.

The spelling of 18910999098 in words is "eighteen billion, nine hundred ten million, nine hundred ninety-nine thousand, ninety-eight".