18285930 has 48 divisors (see below), whose sum is σ = 51203880. Its totient is φ = 4500864.

The previous prime is 18285919. The next prime is 18285983. The reversal of 18285930 is 3958281.

18285930 = 1180² + 1181² + ... + 1192².

It can be written as a sum of positive squares in 4 ways, for example, as 16867449 + 1418481 = 4107^2 + 1191^2 .

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 23 ways as a sum of consecutive naturals, for example, 6645 + ... + 8984.

Almost surely, 2^18285930 is an apocalyptic number.

18285930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18285930 is an abundant number, since it is smaller than the sum of its proper divisors (32917950).

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

18285930 is a wasteful number, since it uses less digits than its factorization.

18285930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15655 (or 15652 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 18285930 is about 4276.2050933041. The cubic root of 18285930 is about 263.4545383753.

The spelling of 18285930 in words is "eighteen million, two hundred eighty-five thousand, nine hundred thirty".