18300312 has 48 divisors (see below), whose sum is σ = 49762440. Its totient is φ = 6075648.

The previous prime is 18300301. The next prime is 18300353. The reversal of 18300312 is 21300381.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 30883 + ... + 31469.

Almost surely, 2^18300312 is an apocalyptic number.

18300312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18300312 is an abundant number, since it is smaller than the sum of its proper divisors (31462128).

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

18300312 is a wasteful number, since it uses less digits than its factorization.

18300312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1025 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18300312 is about 4277.8863940035. The cubic root of 18300312 is about 263.5235898308.

Adding to 18300312 its reverse (21300381), we get a palindrome (39600693).

The spelling of 18300312 in words is "eighteen million, three hundred thousand, three hundred twelve".