18001024 has 32 divisors (see below), whose sum is σ = 36414000. Its totient is φ = 8861952.

The previous prime is 18000989. The next prime is 18001031. The reversal of 18001024 is 42010081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 18000989 and 18001007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7527 + ... + 9625.

Almost surely, 2^18001024 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 18001024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18207000).

18001024 is an abundant number, since it is smaller than the sum of its proper divisors (18412976).

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

18001024 is an equidigital number, since it uses as much as digits as its factorization.

18001024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 18001024 is about 4242.7613649603. The cubic root of 18001024 is about 262.0791090289.

The spelling of 18001024 in words is "eighteen million, one thousand, twenty-four".