18499698840 has 256 divisors, whose sum is σ = 67298918400. Its totient is φ = 3973971456.

The previous prime is 18499698827. The next prime is 18499698863. The reversal of 18499698840 is 4889699481.

It is a congruent number.

It is an unprimeable number.

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 in 63 ways as a sum of consecutive naturals, for example, 2022357 + ... + 2031483.

It is an arithmetic number, because the mean of its divisors is an integer number (262886400).

Almost surely, 2^18499698840 is an apocalyptic number.

18499698840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18499698840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33649459200).

18499698840 is an abundant number, since it is smaller than the sum of its proper divisors (48799219560).

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

18499698840 is a wasteful number, since it uses less digits than its factorization.

18499698840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9294 (or 9290 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 66.

The spelling of 18499698840 in words is "eighteen billion, four hundred ninety-nine million, six hundred ninety-eight thousand, eight hundred forty".