18303912 has 96 divisors (see below), whose sum is σ = 54812160. Its totient is φ = 5517600.

The previous prime is 18303911. The next prime is 18303913. The reversal of 18303912 is 21930381.

It is an interprime number because it is at equal distance from previous prime (18303911) and next prime (18303913).

It is not an unprimeable number, because it can be changed into a prime (18303911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95737 + ... + 95927.

It is an arithmetic number, because the mean of its divisors is an integer number (570960).

Almost surely, 2^18303912 is an apocalyptic number.

18303912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18303912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27406080).

18303912 is an abundant number, since it is smaller than the sum of its proper divisors (36508248).

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

18303912 is a wasteful number, since it uses less digits than its factorization.

18303912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18303912 is about 4278.3071418494. The cubic root of 18303912 is about 263.5408686386.

The spelling of 18303912 in words is "eighteen million, three hundred three thousand, nine hundred twelve".