18130616 has 24 divisors (see below), whose sum is σ = 38919720. Its totient is φ = 7756608.

The previous prime is 18130591. The next prime is 18130621. The reversal of 18130616 is 61603181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31580 + ... + 32148.

It is an arithmetic number, because the mean of its divisors is an integer number (1621655).

Almost surely, 2^18130616 is an apocalyptic number.

It is an amenable number.

18130616 is an abundant number, since it is smaller than the sum of its proper divisors (20789104).

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

18130616 is an frugal number, since it uses more digits than its factorization.

18130616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18130616 is about 4258.0061061487. The cubic root of 18130616 is about 262.7065210754.

Adding to 18130616 its reverse (61603181), we get a palindrome (79733797).

The spelling of 18130616 in words is "eighteen million, one hundred thirty thousand, six hundred sixteen".