18473472 has 120 divisors (see below), whose sum is σ = 56387760. Its totient is φ = 5806080.

The previous prime is 18473461. The next prime is 18473473. The reversal of 18473472 is 27437481.

It is a happy number.

18473472 is a `hidden beast` number, since 184 + 7 + 3 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18473473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87447 + ... + 87657.

It is an arithmetic number, because the mean of its divisors is an integer number (469898).

Almost surely, 2^18473472 is an apocalyptic number.

18473472 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 18473472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28193880).

18473472 is an abundant number, since it is smaller than the sum of its proper divisors (37914288).

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

18473472 is a wasteful number, since it uses less digits than its factorization.

18473472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 235 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 18473472 is about 4298.0777098605. The cubic root of 18473472 is about 264.3521471452.

The spelling of 18473472 in words is "eighteen million, four hundred seventy-three thousand, four hundred seventy-two".