18638614 has 4 divisors (see below), whose sum is σ = 27957924. Its totient is φ = 9319306.

The previous prime is 18638603. The next prime is 18638617. The reversal of 18638614 is 41683681.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18638617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4659652 + ... + 4659655.

It is an arithmetic number, because the mean of its divisors is an integer number (6989481).

Almost surely, 2^18638614 is an apocalyptic number.

18638614 is a deficient number, since it is larger than the sum of its proper divisors (9319310).

18638614 is an equidigital number, since it uses as much as digits as its factorization.

18638614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319309.

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

The square root of 18638614 is about 4317.2461129753. The cubic root of 18638614 is about 265.1375291826.

The spelling of 18638614 in words is "eighteen million, six hundred thirty-eight thousand, six hundred fourteen".