18083638 has 8 divisors (see below), whose sum is σ = 27168480. Its totient is φ = 9027480.

The previous prime is 18083627. The next prime is 18083651. The reversal of 18083638 is 83638081.

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

It is a junction number, because it is equal to n+sod(n) for n = 18083597 and 18083606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5518 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (3396060).

Almost surely, 2^18083638 is an apocalyptic number.

18083638 is a deficient number, since it is larger than the sum of its proper divisors (9084842).

18083638 is a wasteful number, since it uses less digits than its factorization.

18083638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14342.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18083638 is about 4252.4860963911. The cubic root of 18083638 is about 262.4794263543.

It can be divided in two parts, 18083 and 638, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 18083638 in words is "eighteen million, eighty-three thousand, six hundred thirty-eight".