18424634 has 8 divisors (see below), whose sum is σ = 29262708. Its totient is φ = 8670400.

The previous prime is 18424613. The next prime is 18424639. The reversal of 18424634 is 43642481.

It can be written as a sum of positive squares in 2 ways, for example, as 17430625 + 994009 = 4175^2 + 997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18424634.

It is not an unprimeable number, because it can be changed into a prime (18424639) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 270917 + ... + 270984.

Almost surely, 2^18424634 is an apocalyptic number.

18424634 is a deficient number, since it is larger than the sum of its proper divisors (10838074).

18424634 is a wasteful number, since it uses less digits than its factorization.

18424634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541920.

The product of its digits is 18432, while the sum is 32.

The square root of 18424634 is about 4292.3925729132. The cubic root of 18424634 is about 264.1189871500.

The spelling of 18424634 in words is "eighteen million, four hundred twenty-four thousand, six hundred thirty-four".