18841668 has 24 divisors (see below), whose sum is σ = 44419872. Its totient is φ = 6215424.

The previous prime is 18841663. The next prime is 18841699. The reversal of 18841668 is 86614881.

It is not an unprimeable number, because it can be changed into a prime (18841663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6930 + ... + 9257.

It is an arithmetic number, because the mean of its divisors is an integer number (1850828).

Almost surely, 2^18841668 is an apocalyptic number.

It is an amenable number.

18841668 is an abundant number, since it is smaller than the sum of its proper divisors (25578204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18841668 is a wasteful number, since it uses less digits than its factorization.

18841668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16291 (or 16289 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 18841668 is about 4340.6990220470. The cubic root of 18841668 is about 266.0968799314.

The spelling of 18841668 in words is "eighteen million, eight hundred forty-one thousand, six hundred sixty-eight".