18680064 has 72 divisors (see below), whose sum is σ = 53569152. Its totient is φ = 5744640.

The previous prime is 18680047. The next prime is 18680083. The reversal of 18680064 is 46008681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9049 + ... + 10919.

It is an arithmetic number, because the mean of its divisors is an integer number (744016).

Almost surely, 2^18680064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18680064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26784576).

18680064 is an abundant number, since it is smaller than the sum of its proper divisors (34889088).

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

18680064 is a wasteful number, since it uses less digits than its factorization.

18680064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 18680064 is about 4322.0439609055. The cubic root of 18680064 is about 265.3339281542. Note that the first 3 decimals are identical.

The spelling of 18680064 in words is "eighteen million, six hundred eighty thousand, sixty-four".