18545472 has 84 divisors (see below), whose sum is σ = 58009536. Its totient is φ = 5617920.

The previous prime is 18545467. The next prime is 18545477. The reversal of 18545472 is 27454581.

18545472 is a `hidden beast` number, since 185 + 4 + 5 + 472 = 666.

It is an interprime number because it is at equal distance from previous prime (18545467) and next prime (18545477).

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18545477) 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, 4873 + ... + 7799.

Almost surely, 2^18545472 is an apocalyptic number.

18545472 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 18545472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29004768).

18545472 is an abundant number, since it is smaller than the sum of its proper divisors (39464064).

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

18545472 is a wasteful number, since it uses less digits than its factorization.

18545472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956 (or 2943 counting only the distinct ones).

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

The square root of 18545472 is about 4306.4454019528. The cubic root of 18545472 is about 264.6951377251.

It can be divided in two parts, 18 and 545472, that added together give a triangular number (545490 = T₁₀₄₄).

The spelling of 18545472 in words is "eighteen million, five hundred forty-five thousand, four hundred seventy-two".