18270009 has 16 divisors (see below), whose sum is σ = 27374400. Its totient is φ = 12041568.

The previous prime is 18269957. The next prime is 18270013. The reversal of 18270009 is 90007281.

It is not a de Polignac number, because 18270009 - 2¹¹ = 18267961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18270059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399 + ... + 6204.

It is an arithmetic number, because the mean of its divisors is an integer number (1710900).

Almost surely, 2^18270009 is an apocalyptic number.

It is an amenable number.

18270009 is a deficient number, since it is larger than the sum of its proper divisors (9104391).

18270009 is an equidigital number, since it uses as much as digits as its factorization.

18270009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701 (or 7695 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 18270009 is about 4274.3431074260. The cubic root of 18270009 is about 263.3780555709.

The spelling of 18270009 in words is "eighteen million, two hundred seventy thousand, nine".