18145072 has 40 divisors (see below), whose sum is σ = 38693952. Its totient is φ = 8174400.

The previous prime is 18145067. The next prime is 18145073. The reversal of 18145072 is 27054181.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18145072.

It is not an unprimeable number, because it can be changed into a prime (18145073) 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, 22663 + ... + 23449.

Almost surely, 2^18145072 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 18145072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19346976).

18145072 is an abundant number, since it is smaller than the sum of its proper divisors (20548880).

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

18145072 is a wasteful number, since it uses less digits than its factorization.

18145072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18145072 is about 4259.7032760510. The cubic root of 18145072 is about 262.7763233845.

It can be divided in two parts, 1814 and 5072, that added together give a palindrome (6886).

The spelling of 18145072 in words is "eighteen million, one hundred forty-five thousand, seventy-two".