18580044 has 96 divisors (see below), whose sum is σ = 52899840. Its totient is φ = 4961088.

The previous prime is 18580019. The next prime is 18580057. The reversal of 18580044 is 44008581.

It is a junction number, because it is equal to n+sod(n) for n = 18579993 and 18580020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113907 + ... + 114069.

It is an arithmetic number, because the mean of its divisors is an integer number (551040).

Almost surely, 2^18580044 is an apocalyptic number.

18580044 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 18580044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26449920).

18580044 is an abundant number, since it is smaller than the sum of its proper divisors (34319796).

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

18580044 is a wasteful number, since it uses less digits than its factorization.

18580044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 18580044 is about 4310.4575163200. The cubic root of 18580044 is about 264.8595149525.

The spelling of 18580044 in words is "eighteen million, five hundred eighty thousand, forty-four".