18523230 has 32 divisors (see below), whose sum is σ = 48498048. Its totient is φ = 4490400.

The previous prime is 18523229. The next prime is 18523231. The reversal of 18523230 is 3232581.

It is an interprime number because it is at equal distance from previous prime (18523229) and next prime (18523231).

It is a super-2 number, since 2×18523230² = 686220099265800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18523230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18523231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27736 + ... + 28395.

It is an arithmetic number, because the mean of its divisors is an integer number (1515564).

Almost surely, 2^18523230 is an apocalyptic number.

18523230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18523230 is an abundant number, since it is smaller than the sum of its proper divisors (29974818).

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

18523230 is a wasteful number, since it uses less digits than its factorization.

18523230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56152.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 18523230 is about 4303.8622189842. The cubic root of 18523230 is about 264.5892771241.

The spelling of 18523230 in words is "eighteen million, five hundred twenty-three thousand, two hundred thirty".