18069328 has 10 divisors (see below), whose sum is σ = 35009354. Its totient is φ = 9034656.

The previous prime is 18069319. The next prime is 18069347. The reversal of 18069328 is 82396081.

It can be written as a sum of positive squares in only one way, i.e., 17539344 + 529984 = 4188^2 + 728^2 .

It is a super-2 number, since 2×18069328² = 653001228743168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564651 + ... + 564682.

Almost surely, 2^18069328 is an apocalyptic number.

It is an amenable number.

18069328 is a deficient number, since it is larger than the sum of its proper divisors (16940026).

18069328 is a wasteful number, since it uses less digits than its factorization.

18069328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129341 (or 1129335 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18069328 is about 4250.8032182165. The cubic root of 18069328 is about 262.4101727416.

The spelling of 18069328 in words is "eighteen million, sixty-nine thousand, three hundred twenty-eight".