18530424 has 96 divisors (see below), whose sum is σ = 56658000. Its totient is φ = 5607360.

The previous prime is 18530419. The next prime is 18530431. The reversal of 18530424 is 42403581.

It is a super-2 number, since 2×18530424² = 686753227239552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25782 + ... + 26490.

Almost surely, 2^18530424 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 18530424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28329000).

18530424 is an abundant number, since it is smaller than the sum of its proper divisors (38127576).

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

18530424 is a wasteful number, since it uses less digits than its factorization.

18530424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 18530424 is about 4304.6978988078. The cubic root of 18530424 is about 264.6235261706.

The spelling of 18530424 in words is "eighteen million, five hundred thirty thousand, four hundred twenty-four".