18698345 has 4 divisors (see below), whose sum is σ = 22438020. Its totient is φ = 14958672.

The previous prime is 18698297. The next prime is 18698371. The reversal of 18698345 is 54389681.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 11812969 = 2624^2 + 3437^2 .

It is a cyclic number.

It is not a de Polignac number, because 18698345 - 2⁸ = 18698089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18698296 and 18698305.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1869830 + ... + 1869839.

It is an arithmetic number, because the mean of its divisors is an integer number (5609505).

Almost surely, 2^18698345 is an apocalyptic number.

It is an amenable number.

18698345 is a deficient number, since it is larger than the sum of its proper divisors (3739675).

18698345 is an equidigital number, since it uses as much as digits as its factorization.

18698345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739674.

The product of its digits is 207360, while the sum is 44.

The square root of 18698345 is about 4324.1582996001. The cubic root of 18698345 is about 265.4204551255.

The spelling of 18698345 in words is "eighteen million, six hundred ninety-eight thousand, three hundred forty-five".