18002668 has 6 divisors (see below), whose sum is σ = 31504676. Its totient is φ = 9001332.

The previous prime is 18002659. The next prime is 18002717. The reversal of 18002668 is 86620081.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2250330 + ... + 2250337.

Almost surely, 2^18002668 is an apocalyptic number.

It is an amenable number.

18002668 is a deficient number, since it is larger than the sum of its proper divisors (13502008).

18002668 is a wasteful number, since it uses less digits than its factorization.

18002668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500671 (or 4500669 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 18002668 is about 4242.9551022843. The cubic root of 18002668 is about 262.0870871850.

The spelling of 18002668 in words is "eighteen million, two thousand, six hundred sixty-eight".