18102012 has 24 divisors (see below), whose sum is σ = 44075136. Its totient is φ = 5771568.

The previous prime is 18101971. The next prime is 18102013. The reversal of 18102012 is 21020181.

It is a junction number, because it is equal to n+sod(n) for n = 18101982 and 18102000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18102013) by changing a digit.

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, 32518 + ... + 33069.

It is an arithmetic number, because the mean of its divisors is an integer number (1836464).

Almost surely, 2^18102012 is an apocalyptic number.

18102012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18102012 is an abundant number, since it is smaller than the sum of its proper divisors (25973124).

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

18102012 is a wasteful number, since it uses less digits than its factorization.

18102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65617 (or 65615 counting only the distinct ones).

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

The square root of 18102012 is about 4254.6459312145. The cubic root of 18102012 is about 262.5682942486.

Adding to 18102012 its reverse (21020181), we get a palindrome (39122193).

The spelling of 18102012 in words is "eighteen million, one hundred two thousand, twelve".