18696745 has 4 divisors (see below), whose sum is σ = 22436100. Its totient is φ = 14957392.

The previous prime is 18696721. The next prime is 18696749. The reversal of 18696745 is 54769681.

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 2286144 + 16410601 = 1512^2 + 4051^2 .

It is a cyclic number.

It is not a de Polignac number, because 18696745 - 2⁹ = 18696233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18696695 and 18696704.

It is not an unprimeable number, because it can be changed into a prime (18696749) 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 in 3 ways as a sum of consecutive naturals, for example, 1869670 + ... + 1869679.

It is an arithmetic number, because the mean of its divisors is an integer number (5609025).

Almost surely, 2^18696745 is an apocalyptic number.

It is an amenable number.

18696745 is a deficient number, since it is larger than the sum of its proper divisors (3739355).

18696745 is an equidigital number, since it uses as much as digits as its factorization.

18696745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739354.

The product of its digits is 362880, while the sum is 46.

The square root of 18696745 is about 4323.9732885391. The cubic root of 18696745 is about 265.4128843157.

The spelling of 18696745 in words is "eighteen million, six hundred ninety-six thousand, seven hundred forty-five".