18809606 has 4 divisors (see below), whose sum is σ = 28214412. Its totient is φ = 9404802.

The previous prime is 18809597. The next prime is 18809621. The reversal of 18809606 is 60690881.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18809606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4702400 + ... + 4702403.

It is an arithmetic number, because the mean of its divisors is an integer number (7053603).

Almost surely, 2^18809606 is an apocalyptic number.

18809606 is a deficient number, since it is larger than the sum of its proper divisors (9404806).

18809606 is an equidigital number, since it uses as much as digits as its factorization.

18809606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9404805.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 18809606 is about 4337.0042656193. The cubic root of 18809606 is about 265.9458592960.

The spelling of 18809606 in words is "eighteen million, eight hundred nine thousand, six hundred six".