18408534 has 8 divisors (see below), whose sum is σ = 36817080. Its totient is φ = 6136176.

The previous prime is 18408521. The next prime is 18408541. The reversal of 18408534 is 43580481.

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

18408534 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18408495 and 18408504.

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 in 3 ways as a sum of consecutive naturals, for example, 1534039 + ... + 1534050.

It is an arithmetic number, because the mean of its divisors is an integer number (4602135).

Almost surely, 2^18408534 is an apocalyptic number.

18408534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18408534 is a wasteful number, since it uses less digits than its factorization.

18408534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068094.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 18408534 is about 4290.5167520941. The cubic root of 18408534 is about 264.0420330227.

The spelling of 18408534 in words is "eighteen million, four hundred eight thousand, five hundred thirty-four".