18416149 has 4 divisors (see below), whose sum is σ = 19385440. Its totient is φ = 17446860.

The previous prime is 18416141. The next prime is 18416159. The reversal of 18416149 is 94161481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18416149 - 2³ = 18416141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18416141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484617 + ... + 484654.

It is an arithmetic number, because the mean of its divisors is an integer number (4846360).

Almost surely, 2^18416149 is an apocalyptic number.

18416149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18416149 is a deficient number, since it is larger than the sum of its proper divisors (969291).

18416149 is an equidigital number, since it uses as much as digits as its factorization.

18416149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969290.

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

The square root of 18416149 is about 4291.4040825818. The cubic root of 18416149 is about 264.0784364809.

The spelling of 18416149 in words is "eighteen million, four hundred sixteen thousand, one hundred forty-nine".