18819112 has 32 divisors (see below), whose sum is σ = 38656800. Its totient is φ = 8535744.

The previous prime is 18819107. The next prime is 18819131. The reversal of 18819112 is 21191881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4603 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (1208025).

Almost surely, 2^18819112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18819112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19328400).

18819112 is an abundant number, since it is smaller than the sum of its proper divisors (19837688).

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

18819112 is a wasteful number, since it uses less digits than its factorization.

18819112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145 (or 3141 counting only the distinct ones).

The product of its digits is 1152, while the sum is 31.

The square root of 18819112 is about 4338.1000449506. The cubic root of 18819112 is about 265.9906529966.

The spelling of 18819112 in words is "eighteen million, eight hundred nineteen thousand, one hundred twelve".