18300044 has 48 divisors (see below), whose sum is σ = 39137280. Its totient is φ = 7318080.

The previous prime is 18300017. The next prime is 18300071. The reversal of 18300044 is 44000381.

It is an interprime number because it is at equal distance from previous prime (18300017) and next prime (18300071).

It is a super-2 number, since 2×18300044² = 669783220803872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18299989 and 18300025.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24809 + ... + 25535.

It is an arithmetic number, because the mean of its divisors is an integer number (815360).

Almost surely, 2^18300044 is an apocalyptic number.

18300044 is a gapful number since it is divisible by the number (14) 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 18300044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19568640).

18300044 is an abundant number, since it is smaller than the sum of its proper divisors (20837236).

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

18300044 is a wasteful number, since it uses less digits than its factorization.

18300044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 18300044 is about 4277.8550700088. The cubic root of 18300044 is about 263.5223034289.

The spelling of 18300044 in words is "eighteen million, three hundred thousand, forty-four".