18587072 has 42 divisors (see below), whose sum is σ = 42912792. Its totient is φ = 7964544.

The previous prime is 18587039. The next prime is 18587081. The reversal of 18587072 is 27078581.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173 + ... + 6099.

Almost surely, 2^18587072 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 18587072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21456396).

18587072 is an abundant number, since it is smaller than the sum of its proper divisors (24325720).

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

18587072 is an equidigital number, since it uses as much as digits as its factorization.

18587072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5953 (or 5936 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 18587072 is about 4311.2726659306. The cubic root of 18587072 is about 264.8929055806.

The spelling of 18587072 in words is "eighteen million, five hundred eighty-seven thousand, seventy-two".