18989206 has 4 divisors (see below), whose sum is σ = 28483812. Its totient is φ = 9494602.

The previous prime is 18989203. The next prime is 18989213. The reversal of 18989206 is 60298981.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18989203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4747300 + ... + 4747303.

It is an arithmetic number, because the mean of its divisors is an integer number (7120953).

Almost surely, 2^18989206 is an apocalyptic number.

18989206 is a deficient number, since it is larger than the sum of its proper divisors (9494606).

18989206 is an equidigital number, since it uses as much as digits as its factorization.

18989206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494605.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 18989206 is about 4357.6606109242. The cubic root of 18989206 is about 266.7896241995.

The spelling of 18989206 in words is "eighteen million, nine hundred eighty-nine thousand, two hundred six".