18000912 has 20 divisors (see below), whose sum is σ = 46502480. Its totient is φ = 6000288.

The previous prime is 18000901. The next prime is 18000919. The reversal of 18000912 is 21900081.

It is not an unprimeable number, because it can be changed into a prime (18000919) 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, 187462 + ... + 187557.

It is an arithmetic number, because the mean of its divisors is an integer number (2325124).

Almost surely, 2^18000912 is an apocalyptic number.

18000912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18000912 is an abundant number, since it is smaller than the sum of its proper divisors (28501568).

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

18000912 is a wasteful number, since it uses less digits than its factorization.

18000912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375030 (or 375024 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 18000912 is about 4242.7481659886. The cubic root of 18000912 is about 262.0785654872.

Adding to 18000912 its reverse (21900081), we get a palindrome (39900993).

The spelling of 18000912 in words is "eighteen million, nine hundred twelve", and thus it is an aban number.