18107212 has 12 divisors (see below), whose sum is σ = 32122216. Its totient is φ = 8929440.

The previous prime is 18107207. The next prime is 18107237. The reversal of 18107212 is 21270181.

It is a super-2 number, since 2×18107212² = 655742252825888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30714 + ... + 31297.

Almost surely, 2^18107212 is an apocalyptic number.

It is an amenable number.

18107212 is a deficient number, since it is larger than the sum of its proper divisors (14015004).

18107212 is a wasteful number, since it uses less digits than its factorization.

18107212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62088 (or 62086 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 18107212 is about 4255.2569840140. The cubic root of 18107212 is about 262.5934337085.

Adding to 18107212 its reverse (21270181), we get a palindrome (39377393).

The spelling of 18107212 in words is "eighteen million, one hundred seven thousand, two hundred twelve".