18190212 has 24 divisors (see below), whose sum is σ = 42858816. Its totient is φ = 6004128.

The previous prime is 18190127. The next prime is 18190223. The reversal of 18190212 is 21209181.

It is an unprimeable number.

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, 6123 + ... + 8594.

It is an arithmetic number, because the mean of its divisors is an integer number (1785784).

Almost surely, 2^18190212 is an apocalyptic number.

18190212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18190212 is an abundant number, since it is smaller than the sum of its proper divisors (24668604).

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

18190212 is a wasteful number, since it uses less digits than its factorization.

18190212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14827 (or 14825 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 18190212 is about 4264.9984759669. The cubic root of 18190212 is about 262.9940482589.

Adding to 18190212 its reverse (21209181), we get a palindrome (39399393).

The spelling of 18190212 in words is "eighteen million, one hundred ninety thousand, two hundred twelve".