18698834409 has 8 divisors (see below), whose sum is σ = 25340497152. Its totient is φ = 12261530640.

The previous prime is 18698834311. The next prime is 18698834431. The reversal of 18698834409 is 90443889681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18698834409 - 2⁸ = 18698834153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18698834509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51089529 + ... + 51089894.

It is an arithmetic number, because the mean of its divisors is an integer number (3167562144).

Almost surely, 2^18698834409 is an apocalyptic number.

It is an amenable number.

18698834409 is a deficient number, since it is larger than the sum of its proper divisors (6641662743).

18698834409 is a wasteful number, since it uses less digits than its factorization.

18698834409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102179487.

The product of its (nonzero) digits is 11943936, while the sum is 60.

The spelling of 18698834409 in words is "eighteen billion, six hundred ninety-eight million, eight hundred thirty-four thousand, four hundred nine".