18945016 has 8 divisors (see below), whose sum is σ = 35521920. Its totient is φ = 9472504.

The previous prime is 18945013. The next prime is 18945019. The reversal of 18945016 is 61054981.

It is an interprime number because it is at equal distance from previous prime (18945013) and next prime (18945019).

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18945011) 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 as a sum of consecutive naturals, namely, 1184056 + ... + 1184071.

It is an arithmetic number, because the mean of its divisors is an integer number (4440240).

Almost surely, 2^18945016 is an apocalyptic number.

It is an amenable number.

18945016 is a deficient number, since it is larger than the sum of its proper divisors (16576904).

18945016 is a wasteful number, since it uses less digits than its factorization.

18945016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368133 (or 2368129 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18945016 is about 4352.5872765517. The cubic root of 18945016 is about 266.5825137241.

Adding to 18945016 its reverse (61054981), we get a palindrome (79999997).

The spelling of 18945016 in words is "eighteen million, nine hundred forty-five thousand, sixteen".