18965530 has 16 divisors (see below), whose sum is σ = 34571520. Its totient is φ = 7489872.

The previous prime is 18965519. The next prime is 18965563. The reversal of 18965530 is 3556981.

It is a self number, because there is not a number n which added to its sum of digits gives 18965530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11214 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (2160720).

Almost surely, 2^18965530 is an apocalyptic number.

18965530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18965530 is a deficient number, since it is larger than the sum of its proper divisors (15605990).

18965530 is a wasteful number, since it uses less digits than its factorization.

18965530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24093.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 18965530 is about 4354.9431684007. The cubic root of 18965530 is about 266.6786991098.

The spelling of 18965530 in words is "eighteen million, nine hundred sixty-five thousand, five hundred thirty".