18412438 has 16 divisors (see below), whose sum is σ = 30772224. Its totient is φ = 8190760.

The previous prime is 18412417. The next prime is 18412439. The reversal of 18412438 is 83421481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18412439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7870 + ... + 9937.

It is an arithmetic number, because the mean of its divisors is an integer number (1923264).

Almost surely, 2^18412438 is an apocalyptic number.

18412438 is a deficient number, since it is larger than the sum of its proper divisors (12359786).

18412438 is a wasteful number, since it uses less digits than its factorization.

18412438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17867.

The product of its digits is 6144, while the sum is 31.

The square root of 18412438 is about 4290.9716848285. The cubic root of 18412438 is about 264.0606973232.

The spelling of 18412438 in words is "eighteen million, four hundred twelve thousand, four hundred thirty-eight".