18058012 has 48 divisors (see below), whose sum is σ = 38949120. Its totient is φ = 7149312.

The previous prime is 18057997. The next prime is 18058021. The reversal of 18058012 is 21085081.

It is a congruent number.

It is an unprimeable number.

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, 27763 + ... + 28405.

It is an arithmetic number, because the mean of its divisors is an integer number (811440).

Almost surely, 2^18058012 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 18058012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19474560).

18058012 is an abundant number, since it is smaller than the sum of its proper divisors (20891108).

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

18058012 is a wasteful number, since it uses less digits than its factorization.

18058012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 18058012 is about 4249.4719671978. The cubic root of 18058012 is about 262.3553827756.

The spelling of 18058012 in words is "eighteen million, fifty-eight thousand, twelve".