18041644 has 24 divisors (see below), whose sum is σ = 32696720. Its totient is φ = 8703936.

The previous prime is 18041623. The next prime is 18041663. The reversal of 18041644 is 44614081.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20134 + ... + 21010.

Almost surely, 2^18041644 is an apocalyptic number.

It is an amenable number.

18041644 is a deficient number, since it is larger than the sum of its proper divisors (14655076).

18041644 is a wasteful number, since it uses less digits than its factorization.

18041644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18041644 is about 4247.5456442515. The cubic root of 18041644 is about 262.2760914522.

The spelling of 18041644 in words is "eighteen million, forty-one thousand, six hundred forty-four".