18135560 has 48 divisors (see below), whose sum is σ = 41833260. Its totient is φ = 7075200.

The previous prime is 18135547. The next prime is 18135581. The reversal of 18135560 is 6553181.

It can be written as a sum of positive squares in 2 ways, for example, as 17255716 + 879844 = 4154^2 + 938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179510 + ... + 179610.

Almost surely, 2^18135560 is an apocalyptic number.

18135560 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 18135560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20916630).

18135560 is an abundant number, since it is smaller than the sum of its proper divisors (23697700).

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

18135560 is a wasteful number, since it uses less digits than its factorization.

18135560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 18135560 is about 4258.5866199949. The cubic root of 18135560 is about 262.7303978704.

The spelling of 18135560 in words is "eighteen million, one hundred thirty-five thousand, five hundred sixty".