18674656 has 144 divisors (see below), whose sum is σ = 50676192. Its totient is φ = 6589440.

The previous prime is 18674627. The next prime is 18674657. The reversal of 18674656 is 65647681.

It is a happy number.

Its product of digits (241920) is a multiple of the sum of its prime factors (105).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18674657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352326 + ... + 352378.

It is an arithmetic number, because the mean of its divisors is an integer number (351918).

Almost surely, 2^18674656 is an apocalyptic number.

18674656 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 18674656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25338096).

18674656 is an abundant number, since it is smaller than the sum of its proper divisors (32001536).

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

18674656 is a wasteful number, since it uses less digits than its factorization.

18674656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 86 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 18674656 is about 4321.4182857020. The cubic root of 18674656 is about 265.3083203837.

The spelling of 18674656 in words is "eighteen million, six hundred seventy-four thousand, six hundred fifty-six".