18672312 has 16 divisors (see below), whose sum is σ = 46680840. Its totient is φ = 6224096.

The previous prime is 18672281. The next prime is 18672319. The reversal of 18672312 is 21327681.

It is a self number, because there is not a number n which added to its sum of digits gives 18672312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18672319) 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 3 ways as a sum of consecutive naturals, for example, 388983 + ... + 389030.

Almost surely, 2^18672312 is an apocalyptic number.

18672312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18672312 is an abundant number, since it is smaller than the sum of its proper divisors (28008528).

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

18672312 is a wasteful number, since it uses less digits than its factorization.

18672312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778022 (or 778018 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 18672312 is about 4321.1470699341. The cubic root of 18672312 is about 265.2972196219.

Adding to 18672312 its reverse (21327681), we get a palindrome (39999993).

The spelling of 18672312 in words is "eighteen million, six hundred seventy-two thousand, three hundred twelve".