18349658880 has 864 divisors, whose sum is σ = 74163253248. Its totient is φ = 3782246400.

The previous prime is 18349658869. The next prime is 18349658893. The reversal of 18349658880 is 8885694381.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 95 ways as a sum of consecutive naturals, for example, 300814050 + ... + 300814110.

Almost surely, 2^18349658880 is an apocalyptic number.

18349658880 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 18349658880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37081626624).

18349658880 is an abundant number, since it is smaller than the sum of its proper divisors (55813594368).

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

18349658880 is a wasteful number, since it uses less digits than its factorization.

18349658880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 60.

The spelling of 18349658880 in words is "eighteen billion, three hundred forty-nine million, six hundred fifty-eight thousand, eight hundred eighty".