18040306 has 8 divisors (see below), whose sum is σ = 27689904. Its totient is φ = 8810340.

The previous prime is 18040277. The next prime is 18040327. The reversal of 18040306 is 60304081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104800 + ... + 104971.

It is an arithmetic number, because the mean of its divisors is an integer number (3461238).

Almost surely, 2^18040306 is an apocalyptic number.

18040306 is a deficient number, since it is larger than the sum of its proper divisors (9649598).

18040306 is a wasteful number, since it uses less digits than its factorization.

18040306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209816.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 18040306 is about 4247.3881386094. The cubic root of 18040306 is about 262.2696076734.

Adding to 18040306 its reverse (60304081), we get a palindrome (78344387).

The spelling of 18040306 in words is "eighteen million, forty thousand, three hundred six".