18894698 has 4 divisors (see below), whose sum is σ = 28342050. Its totient is φ = 9447348.

The previous prime is 18894697. The next prime is 18894713. The reversal of 18894698 is 89649881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89649881 = 2371 ⋅37811.

It can be written as a sum of positive squares in only one way, i.e., 13890529 + 5004169 = 3727^2 + 2237^2 .

It is a super-2 number, since 2×18894698² = 714019225022408, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18894697) 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, 4723673 + ... + 4723676.

Almost surely, 2^18894698 is an apocalyptic number.

18894698 is a deficient number, since it is larger than the sum of its proper divisors (9447352).

18894698 is an equidigital number, since it uses as much as digits as its factorization.

18894698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447351.

The product of its digits is 995328, while the sum is 53.

The square root of 18894698 is about 4346.8031931524. The cubic root of 18894698 is about 266.3462899022.

The spelling of 18894698 in words is "eighteen million, eight hundred ninety-four thousand, six hundred ninety-eight".