18653945 has 8 divisors (see below), whose sum is σ = 22465536. Its totient is φ = 14869296.

The previous prime is 18653923. The next prime is 18653963. The reversal of 18653945 is 54935681.

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 18653945 - 2¹⁴ = 18637561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5177 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (2808192).

Almost surely, 2^18653945 is an apocalyptic number.

It is an amenable number.

18653945 is a deficient number, since it is larger than the sum of its proper divisors (3811591).

18653945 is a wasteful number, since it uses less digits than its factorization.

18653945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471.

The product of its digits is 129600, while the sum is 41.

The square root of 18653945 is about 4319.0213011746. The cubic root of 18653945 is about 265.2102046415.

The spelling of 18653945 in words is "eighteen million, six hundred fifty-three thousand, nine hundred forty-five".