18099936 has 60 divisors (see below), whose sum is σ = 53239032. Its totient is φ = 6032448.

The previous prime is 18099929. The next prime is 18099941. The reversal of 18099936 is 63999081.

It is a junction number, because it is equal to n+sod(n) for n = 18099891 and 18099900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 900 + ... + 6083.

Almost surely, 2^18099936 is an apocalyptic number.

18099936 is a gapful number since it is divisible by the number (16) 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 18099936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26619516).

18099936 is an abundant number, since it is smaller than the sum of its proper divisors (35139096).

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

18099936 is an equidigital number, since it uses as much as digits as its factorization.

18099936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005 (or 6988 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 18099936 is about 4254.4019556220. The cubic root of 18099936 is about 262.5582564580.

The spelling of 18099936 in words is "eighteen million, ninety-nine thousand, nine hundred thirty-six".