18968075009 has 4 divisors (see below), whose sum is σ = 20427157716. Its totient is φ = 17508992304.

The previous prime is 18968074981. The next prime is 18968075011. The reversal of 18968075009 is 90057086981.

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 4552470784 + 14415604225 = 67472^2 + 120065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18968075009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18968075069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729541334 + ... + 729541359.

It is an arithmetic number, because the mean of its divisors is an integer number (5106789429).

Almost surely, 2^18968075009 is an apocalyptic number.

It is an amenable number.

18968075009 is a deficient number, since it is larger than the sum of its proper divisors (1459082707).

18968075009 is a wasteful number, since it uses less digits than its factorization.

18968075009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459082706.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 18968075009 in words is "eighteen billion, nine hundred sixty-eight million, seventy-five thousand, nine".