18020112 has 40 divisors (see below), whose sum is σ = 50785440. Its totient is φ = 5460480.

The previous prime is 18020111. The next prime is 18020143. The reversal of 18020112 is 21102081.

It is a junction number, because it is equal to n+sod(n) for n = 18020091 and 18020100.

It is not an unprimeable number, because it can be changed into a prime (18020111) 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, 16537 + ... + 17592.

It is an arithmetic number, because the mean of its divisors is an integer number (1269636).

Almost surely, 2^18020112 is an apocalyptic number.

18020112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18020112 is an abundant number, since it is smaller than the sum of its proper divisors (32765328).

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

18020112 is a wasteful number, since it uses less digits than its factorization.

18020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34151 (or 34145 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 18020112 is about 4245.0102473375. The cubic root of 18020112 is about 262.1717111471.

Adding to 18020112 its reverse (21102081), we get a palindrome (39122193).

The spelling of 18020112 in words is "eighteen million, twenty thousand, one hundred twelve".