18082212 has 12 divisors (see below), whose sum is σ = 42191856. Its totient is φ = 6027400.

The previous prime is 18082201. The next prime is 18082213. The reversal of 18082212 is 21228081.

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

It is not an unprimeable number, because it can be changed into a prime (18082213) 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, 753414 + ... + 753437.

It is an arithmetic number, because the mean of its divisors is an integer number (3515988).

Almost surely, 2^18082212 is an apocalyptic number.

18082212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18082212 is an abundant number, since it is smaller than the sum of its proper divisors (24109644).

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

18082212 is a wasteful number, since it uses less digits than its factorization.

18082212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506858 (or 1506856 counting only the distinct ones).

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

The square root of 18082212 is about 4252.3184264587. The cubic root of 18082212 is about 262.4725268300.

The spelling of 18082212 in words is "eighteen million, eighty-two thousand, two hundred twelve".