18006630 has 16 divisors (see below), whose sum is σ = 43215984. Its totient is φ = 4801760.

The previous prime is 18006617. The next prime is 18006643. The reversal of 18006630 is 3660081.

It is an interprime number because it is at equal distance from previous prime (18006617) and next prime (18006643).

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 18006630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300081 + ... + 300140.

It is an arithmetic number, because the mean of its divisors is an integer number (2700999).

Almost surely, 2^18006630 is an apocalyptic number.

18006630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18006630 is an abundant number, since it is smaller than the sum of its proper divisors (25209354).

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

18006630 is a wasteful number, since it uses less digits than its factorization.

18006630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600231.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 18006630 is about 4243.4219681762. The cubic root of 18006630 is about 262.1063123515.

The spelling of 18006630 in words is "eighteen million, six thousand, six hundred thirty".