18013560 has 64 divisors (see below), whose sum is σ = 55313280. Its totient is φ = 4690560.

The previous prime is 18013559. The next prime is 18013601. The reversal of 18013560 is 6531081.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 18013560.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3415 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (864270).

Almost surely, 2^18013560 is an apocalyptic number.

18013560 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 18013560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27656640).

18013560 is an abundant number, since it is smaller than the sum of its proper divisors (37299720).

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

18013560 is a wasteful number, since it uses less digits than its factorization.

18013560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548 (or 3544 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 18013560 is about 4244.2384475899. The cubic root of 18013560 is about 262.1399326306.

The spelling of 18013560 in words is "eighteen million, thirteen thousand, five hundred sixty".