18809401 has 8 divisors (see below), whose sum is σ = 20304704. Its totient is φ = 17321040.

The previous prime is 18809393. The next prime is 18809419. The reversal of 18809401 is 10490881.

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

It is a cyclic number.

It is not a de Polignac number, because 18809401 - 2³ = 18809393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18809471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4846 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (2538088).

Almost surely, 2^18809401 is an apocalyptic number.

It is an amenable number.

18809401 is a deficient number, since it is larger than the sum of its proper divisors (1495303).

18809401 is a wasteful number, since it uses less digits than its factorization.

18809401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18809401 is about 4336.9806317299. The cubic root of 18809401 is about 265.9448931390.

The spelling of 18809401 in words is "eighteen million, eight hundred nine thousand, four hundred one".