18743424 has 128 divisors (see below), whose sum is σ = 60057600. Its totient is φ = 5059584.

The previous prime is 18743419. The next prime is 18743449. The reversal of 18743424 is 42434781.

It is a tau number, because it is divible by the number of its divisors (128).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50889 + ... + 51255.

It is an arithmetic number, because the mean of its divisors is an integer number (469200).

Almost surely, 2^18743424 is an apocalyptic number.

18743424 is a gapful number since it is divisible by the number (14) 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 18743424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30028800).

18743424 is an abundant number, since it is smaller than the sum of its proper divisors (41314176).

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

18743424 is a wasteful number, since it uses less digits than its factorization.

18743424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 398 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 18743424 is about 4329.3676212583. The cubic root of 18743424 is about 265.6335806963.

The spelling of 18743424 in words is "eighteen million, seven hundred forty-three thousand, four hundred twenty-four".