18890112 has 32 divisors (see below), whose sum is σ = 50177880. Its totient is φ = 6296576.

The previous prime is 18890093. The next prime is 18890117. The reversal of 18890112 is 21109881.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 18890112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24213 + ... + 24980.

Almost surely, 2^18890112 is an apocalyptic number.

18890112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18890112 is an abundant number, since it is smaller than the sum of its proper divisors (31287768).

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

18890112 is an equidigital number, since it uses as much as digits as its factorization.

18890112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49210 (or 49198 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 18890112 is about 4346.2756470339. The cubic root of 18890112 is about 266.3247395371.

Adding to 18890112 its reverse (21109881), we get a palindrome (39999993).

The spelling of 18890112 in words is "eighteen million, eight hundred ninety thousand, one hundred twelve".