18199608 has 64 divisors (see below), whose sum is σ = 52469760. Its totient is φ = 5152896.

The previous prime is 18199589. The next prime is 18199609. The reversal of 18199608 is 80699181.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 18199608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20910 + ... + 21762.

It is an arithmetic number, because the mean of its divisors is an integer number (819840).

Almost surely, 2^18199608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18199608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26234880).

18199608 is an abundant number, since it is smaller than the sum of its proper divisors (34270152).

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

18199608 is a wasteful number, since it uses less digits than its factorization.

18199608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 18199608 is about 4266.0998581843. The cubic root of 18199608 is about 263.0393229140.

The spelling of 18199608 in words is "eighteen million, one hundred ninety-nine thousand, six hundred eight".