18744460 has 72 divisors (see below), whose sum is σ = 47343744. Its totient is φ = 6209280.

The previous prime is 18744443. The next prime is 18744461. The reversal of 18744460 is 6444781.

It is not an unprimeable number, because it can be changed into a prime (18744461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30072 + ... + 30688.

It is an arithmetic number, because the mean of its divisors is an integer number (657552).

Almost surely, 2^18744460 is an apocalyptic number.

18744460 is a gapful number since it is divisible by the number (10) 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 18744460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23671872).

18744460 is an abundant number, since it is smaller than the sum of its proper divisors (28599284).

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

18744460 is a wasteful number, since it uses less digits than its factorization.

18744460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 18744460 is about 4329.4872675641. The cubic root of 18744460 is about 265.6384747028.

The spelling of 18744460 in words is "eighteen million, seven hundred forty-four thousand, four hundred sixty".