18394414 has 4 divisors (see below), whose sum is σ = 27591624. Its totient is φ = 9197206.

The previous prime is 18394403. The next prime is 18394417. The reversal of 18394414 is 41449381.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18394414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18394417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4598602 + ... + 4598605.

It is an arithmetic number, because the mean of its divisors is an integer number (6897906).

Almost surely, 2^18394414 is an apocalyptic number.

18394414 is a deficient number, since it is larger than the sum of its proper divisors (9197210).

18394414 is an equidigital number, since it uses as much as digits as its factorization.

18394414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9197209.

The product of its digits is 13824, while the sum is 34.

The square root of 18394414 is about 4288.8709469976. The cubic root of 18394414 is about 263.9745058791.

The spelling of 18394414 in words is "eighteen million, three hundred ninety-four thousand, four hundred fourteen".