18349800 has 192 divisors, whose sum is σ = 69102720. Its totient is φ = 3932160.

The previous prime is 18349757. The next prime is 18349829. The reversal of 18349800 is 894381.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71272 + ... + 71528.

It is an arithmetic number, because the mean of its divisors is an integer number (359910).

Almost surely, 2^18349800 is an apocalyptic number.

18349800 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 18349800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34551360).

18349800 is an abundant number, since it is smaller than the sum of its proper divisors (50752920).

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

18349800 is a wasteful number, since it uses less digits than its factorization.

18349800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18349800 is about 4283.6666536975. Note that the first 4 decimals coincide. The cubic root of 18349800 is about 263.7609176167.

The spelling of 18349800 in words is "eighteen million, three hundred forty-nine thousand, eight hundred".