18212300 has 18 divisors (see below), whose sum is σ = 39520908. Its totient is φ = 7284880.

The previous prime is 18212291. The next prime is 18212303. The reversal of 18212300 is 321281.

It is not an unprimeable number, because it can be changed into a prime (18212303) 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 5 ways as a sum of consecutive naturals, for example, 90962 + ... + 91161.

It is an arithmetic number, because the mean of its divisors is an integer number (2195606).

Almost surely, 2^18212300 is an apocalyptic number.

18212300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18212300 is an abundant number, since it is smaller than the sum of its proper divisors (21308608).

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

18212300 is a wasteful number, since it uses less digits than its factorization.

18212300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182137 (or 182130 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 18212300 is about 4267.5871402937. The cubic root of 18212300 is about 263.1004546212.

Adding to 18212300 its reverse (321281), we get a palindrome (18533581).

The spelling of 18212300 in words is "eighteen million, two hundred twelve thousand, three hundred".