18285630 has 32 divisors (see below), whose sum is σ = 47875968. Its totient is φ = 4432800.

The previous prime is 18285611. The next prime is 18285643. The reversal of 18285630 is 3658281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18285591 and 18285600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27376 + ... + 28035.

It is an arithmetic number, because the mean of its divisors is an integer number (1496124).

Almost surely, 2^18285630 is an apocalyptic number.

18285630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18285630 is an abundant number, since it is smaller than the sum of its proper divisors (29590338).

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

18285630 is a wasteful number, since it uses less digits than its factorization.

18285630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55432.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18285630 is about 4276.1700153291. The cubic root of 18285630 is about 263.4530976174.

It can be divided in two parts, 18285 and 630, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 18285630 in words is "eighteen million, two hundred eighty-five thousand, six hundred thirty".