18945205 has 8 divisors (see below), whose sum is σ = 22822272. Its totient is φ = 15097488.

The previous prime is 18945161. The next prime is 18945217. The reversal of 18945205 is 50254981.

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 18945205 - 2⁹ = 18944693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5889 + ... + 8518.

It is an arithmetic number, because the mean of its divisors is an integer number (2852784).

Almost surely, 2^18945205 is an apocalyptic number.

It is an amenable number.

18945205 is a deficient number, since it is larger than the sum of its proper divisors (3877067).

18945205 is a wasteful number, since it uses less digits than its factorization.

18945205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14675.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 18945205 is about 4352.6089877222. The cubic root of 18945205 is about 266.5834002181.

The spelling of 18945205 in words is "eighteen million, nine hundred forty-five thousand, two hundred five".