18065472 has 56 divisors (see below), whose sum is σ = 49109376. Its totient is φ = 5856768.

The previous prime is 18065449. The next prime is 18065473. The reversal of 18065472 is 27456081.

It is a super-2 number, since 2×18065472² = 652722557165568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18065473) 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, 5833 + ... + 8375.

Almost surely, 2^18065472 is an apocalyptic number.

18065472 is a gapful number since it is divisible by the number (12) 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 18065472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24554688).

18065472 is an abundant number, since it is smaller than the sum of its proper divisors (31043904).

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

18065472 is a wasteful number, since it uses less digits than its factorization.

18065472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595 (or 2585 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 18065472 is about 4250.3496326773. The cubic root of 18065472 is about 262.3915052773.

The spelling of 18065472 in words is "eighteen million, sixty-five thousand, four hundred seventy-two".