18468730 has 32 divisors (see below), whose sum is σ = 38142720. Its totient is φ = 6307200.

The previous prime is 18468719. The next prime is 18468763. The reversal of 18468730 is 3786481.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18468730.

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, 30430 + ... + 31030.

It is an arithmetic number, because the mean of its divisors is an integer number (1191960).

Almost surely, 2^18468730 is an apocalyptic number.

18468730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18468730 is an abundant number, since it is smaller than the sum of its proper divisors (19673990).

18468730 is a wasteful number, since it uses less digits than its factorization.

18468730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 18468730 is about 4297.5260324982. The cubic root of 18468730 is about 264.3295261466.

The spelling of 18468730 in words is "eighteen million, four hundred sixty-eight thousand, seven hundred thirty".