18237472 has 48 divisors (see below), whose sum is σ = 39517632. Its totient is φ = 8216320.

The previous prime is 18237463. The next prime is 18237493. The reversal of 18237472 is 27473281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69213 + ... + 69475.

It is an arithmetic number, because the mean of its divisors is an integer number (823284).

Almost surely, 2^18237472 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 18237472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19758816).

18237472 is an abundant number, since it is smaller than the sum of its proper divisors (21280160).

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

18237472 is a wasteful number, since it uses less digits than its factorization.

18237472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 473 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 18237472 is about 4270.5353294406. The cubic root of 18237472 is about 263.2216129553.

The spelling of 18237472 in words is "eighteen million, two hundred thirty-seven thousand, four hundred seventy-two".