18630009 has 12 divisors (see below), whose sum is σ = 26956800. Its totient is φ = 12398424.

The previous prime is 18629999. The next prime is 18630037. The reversal of 18630009 is 90003681.

It is not a de Polignac number, because 18630009 - 2⁴ = 18629993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18630049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5032 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (2246400).

Almost surely, 2^18630009 is an apocalyptic number.

It is an amenable number.

18630009 is a deficient number, since it is larger than the sum of its proper divisors (8326791).

18630009 is a wasteful number, since it uses less digits than its factorization.

18630009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604 (or 3601 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18630009 is about 4316.2494135534. The cubic root of 18630009 is about 265.0967203608.

The spelling of 18630009 in words is "eighteen million, six hundred thirty thousand, nine".