18656016 has 40 divisors (see below), whose sum is σ = 48922464. Its totient is φ = 6124800.

The previous prime is 18656009. The next prime is 18656069. The reversal of 18656016 is 61065681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316 + ... + 6116.

Almost surely, 2^18656016 is an apocalyptic number.

18656016 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 18656016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24461232).

18656016 is an abundant number, since it is smaller than the sum of its proper divisors (30266448).

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

18656016 is a wasteful number, since it uses less digits than its factorization.

18656016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18656016 is about 4319.2610479109. The cubic root of 18656016 is about 265.2200190089.

The spelling of 18656016 in words is "eighteen million, six hundred fifty-six thousand, sixteen".