18219030 has 16 divisors (see below), whose sum is σ = 43725744. Its totient is φ = 4858400.

The previous prime is 18219017. The next prime is 18219037. The reversal of 18219030 is 3091281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18219037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303621 + ... + 303680.

It is an arithmetic number, because the mean of its divisors is an integer number (2732859).

Almost surely, 2^18219030 is an apocalyptic number.

18219030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18219030 is an abundant number, since it is smaller than the sum of its proper divisors (25506714).

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

18219030 is a wasteful number, since it uses less digits than its factorization.

18219030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607311.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 18219030 is about 4268.3755692301. The cubic root of 18219030 is about 263.1328585094.

The spelling of 18219030 in words is "eighteen million, two hundred nineteen thousand, thirty".