18231130 has 16 divisors (see below), whose sum is σ = 32873760. Its totient is φ = 7279632.

The previous prime is 18231119. The next prime is 18231137. The reversal of 18231130 is 3113281.

It is a junction number, because it is equal to n+sod(n) for n = 18231098 and 18231107.

It is not an unprimeable number, because it can be changed into a prime (18231137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6157 + ... + 8623.

It is an arithmetic number, because the mean of its divisors is an integer number (2054610).

Almost surely, 2^18231130 is an apocalyptic number.

18231130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18231130 is a deficient number, since it is larger than the sum of its proper divisors (14642630).

18231130 is a wasteful number, since it uses less digits than its factorization.

18231130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18231130 is about 4269.7927350165. The cubic root of 18231130 is about 263.1910980350.

The spelling of 18231130 in words is "eighteen million, two hundred thirty-one thousand, one hundred thirty".