18106530 has 64 divisors (see below), whose sum is σ = 49569408. Its totient is φ = 4193280.

The previous prime is 18106523. The next prime is 18106531. The reversal of 18106530 is 3560181.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18106530.

It is not an unprimeable number, because it can be changed into a prime (18106531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5265 + ... + 7995.

It is an arithmetic number, because the mean of its divisors is an integer number (774522).

Almost surely, 2^18106530 is an apocalyptic number.

18106530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18106530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24784704).

18106530 is an abundant number, since it is smaller than the sum of its proper divisors (31462878).

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

18106530 is a wasteful number, since it uses less digits than its factorization.

18106530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

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

The square root of 18106530 is about 4255.1768470887. The cubic root of 18106530 is about 262.5901368459.

The spelling of 18106530 in words is "eighteen million, one hundred six thousand, five hundred thirty".