18568149 has 32 divisors (see below), whose sum is σ = 27648000. Its totient is φ = 11035584.

The previous prime is 18568139. The next prime is 18568181. The reversal of 18568149 is 94186581.

It is not a de Polignac number, because 18568149 - 2²⁰ = 17519573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18568149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18568129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77572 + ... + 77810.

It is an arithmetic number, because the mean of its divisors is an integer number (864000).

Almost surely, 2^18568149 is an apocalyptic number.

18568149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18568149 is a deficient number, since it is larger than the sum of its proper divisors (9079851).

18568149 is a wasteful number, since it uses less digits than its factorization.

18568149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its digits is 69120, while the sum is 42.

The square root of 18568149 is about 4309.0775114867. The cubic root of 18568149 is about 264.8029816007.

The spelling of 18568149 in words is "eighteen million, five hundred sixty-eight thousand, one hundred forty-nine".