18133424 has 40 divisors (see below), whose sum is σ = 37519920. Its totient is φ = 8460288.

The previous prime is 18133417. The next prime is 18133433. The reversal of 18133424 is 42433181.

It is a junction number, because it is equal to n+sod(n) for n = 18133393 and 18133402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44132 + ... + 44540.

It is an arithmetic number, because the mean of its divisors is an integer number (937998).

Almost surely, 2^18133424 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 18133424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18759960).

18133424 is an abundant number, since it is smaller than the sum of its proper divisors (19386496).

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

18133424 is a wasteful number, since it uses less digits than its factorization.

18133424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 591 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 18133424 is about 4258.3358251787. The cubic root of 18133424 is about 262.7200827002.

The spelling of 18133424 in words is "eighteen million, one hundred thirty-three thousand, four hundred twenty-four".