18474336 has 72 divisors (see below), whose sum is σ = 54840240. Its totient is φ = 5888256.

The previous prime is 18474331. The next prime is 18474343. The reversal of 18474336 is 63347481.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18474336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5230 + ... + 8018.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^18474336 is an apocalyptic number.

18474336 is a gapful number since it is divisible by the number (16) 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 18474336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27420120).

18474336 is an abundant number, since it is smaller than the sum of its proper divisors (36365904).

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

18474336 is a wasteful number, since it uses less digits than its factorization.

18474336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 2817 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 18474336 is about 4298.1782187341. The cubic root of 18474336 is about 264.3562683105.

The spelling of 18474336 in words is "eighteen million, four hundred seventy-four thousand, three hundred thirty-six".