18669712 has 10 divisors (see below), whose sum is σ = 36172598. Its totient is φ = 9334848.

The previous prime is 18669709. The next prime is 18669713. The reversal of 18669712 is 21796681.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 4260096 = 3796^2 + 2064^2 .

It is not an unprimeable number, because it can be changed into a prime (18669713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583413 + ... + 583444.

Almost surely, 2^18669712 is an apocalyptic number.

It is an amenable number.

18669712 is a deficient number, since it is larger than the sum of its proper divisors (17502886).

18669712 is a wasteful number, since it uses less digits than its factorization.

18669712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166865 (or 1166859 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 18669712 is about 4320.8462134170. The cubic root of 18669712 is about 265.2849054034.

The spelling of 18669712 in words is "eighteen million, six hundred sixty-nine thousand, seven hundred twelve".