18010616 has 64 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 7649280.

The previous prime is 18010609. The next prime is 18010627. The reversal of 18010616 is 61601081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18010591 and 18010600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107765 + ... + 107931.

It is an arithmetic number, because the mean of its divisors is an integer number (615195).

Almost surely, 2^18010616 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 18010616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19686240).

18010616 is an abundant number, since it is smaller than the sum of its proper divisors (21361864).

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

18010616 is a wasteful number, since it uses less digits than its factorization.

18010616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 18010616 is about 4243.8916103030. The cubic root of 18010616 is about 262.1256511299.

Adding to 18010616 its reverse (61601081), we get a palindrome (79611697).

The spelling of 18010616 in words is "eighteen million, ten thousand, six hundred sixteen".