18008412 has 12 divisors (see below), whose sum is σ = 42019656. Its totient is φ = 6002800.

The previous prime is 18008387. The next prime is 18008413. The reversal of 18008412 is 21480081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008413) 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 3 ways as a sum of consecutive naturals, for example, 750339 + ... + 750362.

It is an arithmetic number, because the mean of its divisors is an integer number (3501638).

Almost surely, 2^18008412 is an apocalyptic number.

18008412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18008412 is an abundant number, since it is smaller than the sum of its proper divisors (24011244).

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

18008412 is a wasteful number, since it uses less digits than its factorization.

18008412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500708 (or 1500706 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 18008412 is about 4243.6319350292. The cubic root of 18008412 is about 262.1149583899.

Adding to 18008412 its reverse (21480081), we get a palindrome (39488493).

The spelling of 18008412 in words is "eighteen million, eight thousand, four hundred twelve".