18240006 has 16 divisors (see below), whose sum is σ = 36532800. Its totient is φ = 6071208.

The previous prime is 18239993. The next prime is 18240007. The reversal of 18240006 is 60004281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3385 + ... + 6923.

It is an arithmetic number, because the mean of its divisors is an integer number (2283300).

Almost surely, 2^18240006 is an apocalyptic number.

18240006 is an abundant number, since it is smaller than the sum of its proper divisors (18292794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18240006 is a wasteful number, since it uses less digits than its factorization.

18240006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18240006 is about 4270.8320032518. The cubic root of 18240006 is about 263.2338034730.

Adding to 18240006 its reverse (60004281), we get a palindrome (78244287).

The spelling of 18240006 in words is "eighteen million, two hundred forty thousand, six".