18123560 has 96 divisors (see below), whose sum is σ = 50595840. Its totient is φ = 5720832.

The previous prime is 18123559. The next prime is 18123569. The reversal of 18123560 is 6532181.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (18123569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47129 + ... + 47511.

It is an arithmetic number, because the mean of its divisors is an integer number (527040).

Almost surely, 2^18123560 is an apocalyptic number.

18123560 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 18123560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25297920).

18123560 is an abundant number, since it is smaller than the sum of its proper divisors (32472280).

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

18123560 is a wasteful number, since it uses less digits than its factorization.

18123560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 18123560 is about 4257.1774686992. The cubic root of 18123560 is about 262.6724369654.

The spelling of 18123560 in words is "eighteen million, one hundred twenty-three thousand, five hundred sixty".