18036012 has 24 divisors (see below), whose sum is σ = 42473200. Its totient is φ = 5956416.

The previous prime is 18035993. The next prime is 18036013. The reversal of 18036012 is 21063081.

It is a self number, because there is not a number n which added to its sum of digits gives 18036012.

It is not an unprimeable number, because it can be changed into a prime (18036013) 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, 5587 + ... + 8202.

Almost surely, 2^18036012 is an apocalyptic number.

18036012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18036012 is an abundant number, since it is smaller than the sum of its proper divisors (24437188).

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

18036012 is a wasteful number, since it uses less digits than its factorization.

18036012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13905 (or 13903 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18036012 is about 4246.8826214060. The cubic root of 18036012 is about 262.2487973269.

Adding to 18036012 its reverse (21063081), we get a palindrome (39099093).

The spelling of 18036012 in words is "eighteen million, thirty-six thousand, twelve".