18297312 has 48 divisors (see below), whose sum is σ = 52399872. Its totient is φ = 5544320.

The previous prime is 18297283. The next prime is 18297313. The reversal of 18297312 is 21379281.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18297313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7608 + ... + 9719.

It is an arithmetic number, because the mean of its divisors is an integer number (1091664).

Almost surely, 2^18297312 is an apocalyptic number.

18297312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18297312 is an abundant number, since it is smaller than the sum of its proper divisors (34102560).

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

18297312 is a wasteful number, since it uses less digits than its factorization.

18297312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17351 (or 17343 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 18297312 is about 4277.5357391844. The cubic root of 18297312 is about 263.5091890932.

The spelling of 18297312 in words is "eighteen million, two hundred ninety-seven thousand, three hundred twelve".