18674353409 has 8 divisors (see below), whose sum is σ = 20454667560. Its totient is φ = 16969797376.

The previous prime is 18674353391. The next prime is 18674353417. The reversal of 18674353409 is 90435347681.

It can be written as a sum of positive squares in 4 ways, for example, as 637057600 + 18037295809 = 25240^2 + 134303^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18674353409 - 2²⁰ = 18673304833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18674353429) 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, 18939014 + ... + 18939999.

It is an arithmetic number, because the mean of its divisors is an integer number (2556833445).

Almost surely, 2^18674353409 is an apocalyptic number.

It is an amenable number.

18674353409 is a deficient number, since it is larger than the sum of its proper divisors (1780314151).

18674353409 is a wasteful number, since it uses less digits than its factorization.

18674353409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37879059.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 18674353409 in words is "eighteen billion, six hundred seventy-four million, three hundred fifty-three thousand, four hundred nine".