18240830 has 32 divisors (see below), whose sum is σ = 35354880. Its totient is φ = 6750720.

The previous prime is 18240829. The next prime is 18240839. The reversal of 18240830 is 3804281.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18240830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240839) 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 15 ways as a sum of consecutive naturals, for example, 9491 + ... + 11249.

It is an arithmetic number, because the mean of its divisors is an integer number (1104840).

Almost surely, 2^18240830 is an apocalyptic number.

18240830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18240830 is a deficient number, since it is larger than the sum of its proper divisors (17114050).

18240830 is a wasteful number, since it uses less digits than its factorization.

18240830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18240830 is about 4270.9284704851. The cubic root of 18240830 is about 263.2377673129.

The spelling of 18240830 in words is "eighteen million, two hundred forty thousand, eight hundred thirty".