18646016 has 44 divisors (see below), whose sum is σ = 37828560. Its totient is φ = 9185280.

The previous prime is 18646003. The next prime is 18646027. The reversal of 18646016 is 61064681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134075 + ... + 134213.

It is an arithmetic number, because the mean of its divisors is an integer number (859740).

Almost surely, 2^18646016 is an apocalyptic number.

18646016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18646016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18914280).

18646016 is an abundant number, since it is smaller than the sum of its proper divisors (19182544).

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

18646016 is a wasteful number, since it uses less digits than its factorization.

18646016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18646016 is about 4318.1032873242. The cubic root of 18646016 is about 265.1726227837.

The spelling of 18646016 in words is "eighteen million, six hundred forty-six thousand, sixteen".