18306116 has 12 divisors (see below), whose sum is σ = 32138988. Its totient is φ = 9123552.

The previous prime is 18306053. The next prime is 18306121. The reversal of 18306116 is 61160381.

It can be written as a sum of positive squares in 2 ways, for example, as 4393216 + 13912900 = 2096^2 + 3730^2 .

It is a super-2 number, since 2×18306116² = 670227766010912, which contains 22 as substring.

It is a congruent number.

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, 5951 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (2678249).

Almost surely, 2^18306116 is an apocalyptic number.

It is an amenable number.

18306116 is a deficient number, since it is larger than the sum of its proper divisors (13832872).

18306116 is a wasteful number, since it uses less digits than its factorization.

18306116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14758 (or 14756 counting only the distinct ones).

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

The square root of 18306116 is about 4278.5647126110. The cubic root of 18306116 is about 263.5514459907.

Adding to 18306116 its reverse (61160381), we get a palindrome (79466497).

The spelling of 18306116 in words is "eighteen million, three hundred six thousand, one hundred sixteen".