18786412 has 12 divisors (see below), whose sum is σ = 33025216. Its totient is φ = 9350640.

The previous prime is 18786409. The next prime is 18786413. The reversal of 18786412 is 21468781.

It is not an unprimeable number, because it can be changed into a prime (18786413) 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, 9639 + ... + 11422.

Almost surely, 2^18786412 is an apocalyptic number.

It is an amenable number.

18786412 is a deficient number, since it is larger than the sum of its proper divisors (14238804).

18786412 is a wasteful number, since it uses less digits than its factorization.

18786412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21288 (or 21286 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 18786412 is about 4334.3294752476. The cubic root of 18786412 is about 265.8365023114.

The spelling of 18786412 in words is "eighteen million, seven hundred eighty-six thousand, four hundred twelve".