18191130 has 32 divisors (see below), whose sum is σ = 43775424. Its totient is φ = 4838016.

The previous prime is 18191111. The next prime is 18191153. The reversal of 18191130 is 3119181.

It is a self number, because there is not a number n which added to its sum of digits gives 18191130.

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, 17094 + ... + 18126.

It is an arithmetic number, because the mean of its divisors is an integer number (1367982).

Almost surely, 2^18191130 is an apocalyptic number.

18191130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18191130 is an abundant number, since it is smaller than the sum of its proper divisors (25584294).

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

18191130 is a wasteful number, since it uses less digits than its factorization.

18191130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 18191130 is about 4265.1060948117. The cubic root of 18191130 is about 262.9984723318.

The spelling of 18191130 in words is "eighteen million, one hundred ninety-one thousand, one hundred thirty".