18891414 has 16 divisors (see below), whose sum is σ = 41981040. Its totient is φ = 6297120.

The previous prime is 18891409. The next prime is 18891443. The reversal of 18891414 is 41419881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174867 + ... + 174974.

It is an arithmetic number, because the mean of its divisors is an integer number (2623815).

Almost surely, 2^18891414 is an apocalyptic number.

18891414 is an abundant number, since it is smaller than the sum of its proper divisors (23089626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18891414 is a wasteful number, since it uses less digits than its factorization.

18891414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349852 (or 349846 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 18891414 is about 4346.4254278660. The cubic root of 18891414 is about 266.3308582028.

The spelling of 18891414 in words is "eighteen million, eight hundred ninety-one thousand, four hundred fourteen".