18413605 has 32 divisors (see below), whose sum is σ = 26484480. Its totient is φ = 12026880.

The previous prime is 18413581. The next prime is 18413609. The reversal of 18413605 is 50631481.

It is not a de Polignac number, because 18413605 - 2¹⁷ = 18282533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18413609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76285 + ... + 76525.

It is an arithmetic number, because the mean of its divisors is an integer number (827640).

Almost surely, 2^18413605 is an apocalyptic number.

It is an amenable number.

18413605 is a deficient number, since it is larger than the sum of its proper divisors (8070875).

18413605 is a wasteful number, since it uses less digits than its factorization.

18413605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 18413605 is about 4291.1076658597. The cubic root of 18413605 is about 264.0662760218.

The spelling of 18413605 in words is "eighteen million, four hundred thirteen thousand, six hundred five".