18049605 has 32 divisors (see below), whose sum is σ = 33164544. Its totient is φ = 8211456.

The previous prime is 18049583. The next prime is 18049607. The reversal of 18049605 is 50694081.

It is not a de Polignac number, because 18049605 - 2⁷ = 18049477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049607) 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, 41469 + ... + 41901.

It is an arithmetic number, because the mean of its divisors is an integer number (1036392).

Almost surely, 2^18049605 is an apocalyptic number.

18049605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18049605 is a deficient number, since it is larger than the sum of its proper divisors (15114939).

18049605 is a wasteful number, since it uses less digits than its factorization.

18049605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18049605 is about 4248.4826703189. The cubic root of 18049605 is about 262.3146628249.

The spelling of 18049605 in words is "eighteen million, forty-nine thousand, six hundred five".