18398014 has 4 divisors (see below), whose sum is σ = 27597024. Its totient is φ = 9199006.

The previous prime is 18398011. The next prime is 18398021. The reversal of 18398014 is 41089381.

It is a happy number.

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 (18398011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4599502 + ... + 4599505.

It is an arithmetic number, because the mean of its divisors is an integer number (6899256).

Almost surely, 2^18398014 is an apocalyptic number.

18398014 is a deficient number, since it is larger than the sum of its proper divisors (9199010).

18398014 is an equidigital number, since it uses as much as digits as its factorization.

18398014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9199009.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18398014 is about 4289.2906173399. The cubic root of 18398014 is about 263.9917257125.

The spelling of 18398014 in words is "eighteen million, three hundred ninety-eight thousand, fourteen".