18840806 has 8 divisors (see below), whose sum is σ = 28304184. Its totient is φ = 9406080.

The previous prime is 18840803. The next prime is 18840817. The reversal of 18840806 is 60804881.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18840803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5435 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (3538023).

Almost surely, 2^18840806 is an apocalyptic number.

18840806 is a deficient number, since it is larger than the sum of its proper divisors (9463378).

18840806 is a wasteful number, since it uses less digits than its factorization.

18840806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14326.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 18840806 is about 4340.5997281482. The cubic root of 18840806 is about 266.0928219218.

The spelling of 18840806 in words is "eighteen million, eight hundred forty thousand, eight hundred six".