18501112 has 32 divisors (see below), whose sum is σ = 40245120. Its totient is φ = 7809120.

The previous prime is 18501103. The next prime is 18501121. The reversal of 18501112 is 21110581.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18501103) and next prime (18501121).

It is a super-2 number, since 2×18501112² = 684582290473088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18501112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287 + ... + 6217.

It is an arithmetic number, because the mean of its divisors is an integer number (1257660).

Almost surely, 2^18501112 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 18501112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20122560).

18501112 is an abundant number, since it is smaller than the sum of its proper divisors (21744008).

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

18501112 is a wasteful number, since it uses less digits than its factorization.

18501112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011 (or 5007 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 18501112 is about 4301.2918989532. The cubic root of 18501112 is about 264.4839226318.

Adding to 18501112 its reverse (21110581), we get a palindrome (39611693).

The spelling of 18501112 in words is "eighteen million, five hundred one thousand, one hundred twelve".