18002412 has 36 divisors (see below), whose sum is σ = 47194056. Its totient is φ = 6000480.

The previous prime is 18002401. The next prime is 18002419. The reversal of 18002412 is 21420081.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (18002419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8289 + ... + 10232.

It is an arithmetic number, because the mean of its divisors is an integer number (1310946).

Almost surely, 2^18002412 is an apocalyptic number.

18002412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18002412 is an abundant number, since it is smaller than the sum of its proper divisors (29191644).

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

18002412 is a wasteful number, since it uses less digits than its factorization.

18002412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18540 (or 18526 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 18002412 is about 4242.9249345234. The cubic root of 18002412 is about 262.0858448763.

Adding to 18002412 its reverse (21420081), we get a palindrome (39422493).

The spelling of 18002412 in words is "eighteen million, two thousand, four hundred twelve".