18115230 has 32 divisors (see below), whose sum is σ = 49688064. Its totient is φ = 4140576.

The previous prime is 18115219. The next prime is 18115243. The reversal of 18115230 is 3251181.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18115197 and 18115206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42922 + ... + 43341.

It is an arithmetic number, because the mean of its divisors is an integer number (1552752).

Almost surely, 2^18115230 is an apocalyptic number.

18115230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18115230 is an abundant number, since it is smaller than the sum of its proper divisors (31572834).

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

18115230 is a wasteful number, since it uses less digits than its factorization.

18115230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86280.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 18115230 is about 4256.1990085051. The cubic root of 18115230 is about 262.6321873913.

The spelling of 18115230 in words is "eighteen million, one hundred fifteen thousand, two hundred thirty".