18705268 has 6 divisors (see below), whose sum is σ = 32734226. Its totient is φ = 9352632.

The previous prime is 18705263. The next prime is 18705277. The reversal of 18705268 is 86250781.

It can be written as a sum of positive squares in only one way, i.e., 17740944 + 964324 = 4212^2 + 982^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18705263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2338155 + ... + 2338162.

Almost surely, 2^18705268 is an apocalyptic number.

It is an amenable number.

18705268 is a deficient number, since it is larger than the sum of its proper divisors (14028958).

18705268 is a wasteful number, since it uses less digits than its factorization.

18705268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676321 (or 4676319 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 18705268 is about 4324.9587281268. The cubic root of 18705268 is about 265.4532080970.

The spelling of 18705268 in words is "eighteen million, seven hundred five thousand, two hundred sixty-eight".