18064320 has 112 divisors (see below), whose sum is σ = 59301888. Its totient is φ = 4654080.

The previous prime is 18064297. The next prime is 18064331. The reversal of 18064320 is 2346081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 29457 + ... + 30063.

Almost surely, 2^18064320 is an apocalyptic number.

18064320 is a gapful number since it is divisible by the number (10) 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 18064320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29650944).

18064320 is an abundant number, since it is smaller than the sum of its proper divisors (41237568).

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

18064320 is a wasteful number, since it uses less digits than its factorization.

18064320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 18064320 is about 4250.2141122536. The cubic root of 18064320 is about 262.3859277601.

The spelling of 18064320 in words is "eighteen million, sixty-four thousand, three hundred twenty".