18424534 has 4 divisors (see below), whose sum is σ = 27636804. Its totient is φ = 9212266.

The previous prime is 18424529. The next prime is 18424559. The reversal of 18424534 is 43542481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43542481 = 2999 ⋅14519.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18424496 and 18424505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606132 + ... + 4606135.

It is an arithmetic number, because the mean of its divisors is an integer number (6909201).

Almost surely, 2^18424534 is an apocalyptic number.

18424534 is a deficient number, since it is larger than the sum of its proper divisors (9212270).

18424534 is an equidigital number, since it uses as much as digits as its factorization.

18424534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212269.

The product of its digits is 15360, while the sum is 31.

The square root of 18424534 is about 4292.3809243822. The cubic root of 18424534 is about 264.1185093125.

The spelling of 18424534 in words is "eighteen million, four hundred twenty-four thousand, five hundred thirty-four".