18455472 has 160 divisors (see below), whose sum is σ = 64281600. Its totient is φ = 4948992.

The previous prime is 18455461. The next prime is 18455473. The reversal of 18455472 is 27455481.

18455472 is a `hidden beast` number, since 184 + 5 + 5 + 472 = 666.

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

Its product of digits (44800) is a multiple of the sum of its prime factors (400).

It is not an unprimeable number, because it can be changed into a prime (18455473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51229 + ... + 51587.

It is an arithmetic number, because the mean of its divisors is an integer number (401760).

Almost surely, 2^18455472 is an apocalyptic number.

18455472 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 18455472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32140800).

18455472 is an abundant number, since it is smaller than the sum of its proper divisors (45826128).

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

18455472 is a wasteful number, since it uses less digits than its factorization.

18455472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 388 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 18455472 is about 4295.9832401908. The cubic root of 18455472 is about 264.2662602954.

Subtracting 18455472 from its reverse (27455481), we obtain a palindrome (9000009).

The spelling of 18455472 in words is "eighteen million, four hundred fifty-five thousand, four hundred seventy-two".