18059984 has 40 divisors (see below), whose sum is σ = 37640448. Its totient is φ = 8363520.

The previous prime is 18059983. The next prime is 18060017. The reversal of 18059984 is 48995081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18059983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17729 + ... + 18719.

Almost surely, 2^18059984 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 18059984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18820224).

18059984 is an abundant number, since it is smaller than the sum of its proper divisors (19580464).

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

18059984 is a wasteful number, since it uses less digits than its factorization.

18059984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18059984 is about 4249.7039896915. The cubic root of 18059984 is about 262.3649324791.

The spelling of 18059984 in words is "eighteen million, fifty-nine thousand, nine hundred eighty-four".