18114660 has 72 divisors (see below), whose sum is σ = 55384056. Its totient is φ = 4792320.

The previous prime is 18114641. The next prime is 18114671. The reversal of 18114660 is 6641181.

It can be written as a sum of positive squares in 4 ways, for example, as 3415104 + 14699556 = 1848^2 + 3834^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27940 + ... + 28580.

It is an arithmetic number, because the mean of its divisors is an integer number (769223).

Almost surely, 2^18114660 is an apocalyptic number.

18114660 is a gapful number since it is divisible by the number (10) 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 18114660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27692028).

18114660 is an abundant number, since it is smaller than the sum of its proper divisors (37269396).

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

18114660 is a wasteful number, since it uses less digits than its factorization.

18114660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18114660 is about 4256.1320468237. The cubic root of 18114660 is about 262.6294327678.

It can be divided in two parts, 181 and 14660, that added together give a palindrome (14841).

The spelling of 18114660 in words is "eighteen million, one hundred fourteen thousand, six hundred sixty".