18343424 has 40 divisors (see below), whose sum is σ = 39995208. Its totient is φ = 8335360.

The previous prime is 18343421. The next prime is 18343427. The reversal of 18343424 is 42434381.

It is an interprime number because it is at equal distance from previous prime (18343421) and next prime (18343427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4004 + ... + 7260.

Almost surely, 2^18343424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18343424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19997604).

18343424 is an abundant number, since it is smaller than the sum of its proper divisors (21651784).

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

18343424 is an equidigital number, since it uses as much as digits as its factorization.

18343424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286 (or 3270 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 18343424 is about 4282.9223667958. The cubic root of 18343424 is about 263.7303644330.

The spelling of 18343424 in words is "eighteen million, three hundred forty-three thousand, four hundred twenty-four".