18389112 has 96 divisors (see below), whose sum is σ = 56361600. Its totient is φ = 4971456.

The previous prime is 18389101. The next prime is 18389117. The reversal of 18389112 is 21198381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18389117) 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, 21933 + ... + 22755.

It is an arithmetic number, because the mean of its divisors is an integer number (587100).

Almost surely, 2^18389112 is an apocalyptic number.

18389112 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 18389112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28180800).

18389112 is an abundant number, since it is smaller than the sum of its proper divisors (37972488).

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

18389112 is a wasteful number, since it uses less digits than its factorization.

18389112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 854 counting only the distinct ones).

The product of its digits is 3456, while the sum is 33.

The square root of 18389112 is about 4288.2527910560. The cubic root of 18389112 is about 263.9491407996.

The spelling of 18389112 in words is "eighteen million, three hundred eighty-nine thousand, one hundred twelve".