18668080 has 40 divisors (see below), whose sum is σ = 43635600. Its totient is φ = 7427328.

The previous prime is 18668077. The next prime is 18668099. The reversal of 18668080 is 8086681.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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, 17811 + ... + 18829.

It is an arithmetic number, because the mean of its divisors is an integer number (1090890).

Almost surely, 2^18668080 is an apocalyptic number.

18668080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18668080 is an abundant number, since it is smaller than the sum of its proper divisors (24967520).

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

18668080 is a wasteful number, since it uses less digits than its factorization.

18668080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 18668080 is about 4320.6573573937. The cubic root of 18668080 is about 265.2771752791.

The spelling of 18668080 in words is "eighteen million, six hundred sixty-eight thousand, eighty".