18581130 has 32 divisors (see below), whose sum is σ = 49550400. Its totient is φ = 4954896.

The previous prime is 18581113. The next prime is 18581191. The reversal of 18581130 is 3118581.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18581094 and 18581103.

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, 34140 + ... + 34679.

It is an arithmetic number, because the mean of its divisors is an integer number (1548450).

Almost surely, 2^18581130 is an apocalyptic number.

18581130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18581130 is an abundant number, since it is smaller than the sum of its proper divisors (30969270).

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

18581130 is a wasteful number, since it uses less digits than its factorization.

18581130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68835 (or 68829 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 18581130 is about 4310.5834871859. The cubic root of 18581130 is about 264.8646751812.

The spelling of 18581130 in words is "eighteen million, five hundred eighty-one thousand, one hundred thirty".