18103343673 has 32 divisors (see below), whose sum is σ = 25849684224. Its totient is φ = 11229437952.

The previous prime is 18103343633. The next prime is 18103343689. The reversal of 18103343673 is 37634330181.

It is a happy number.

It is not a de Polignac number, because 18103343673 - 2²⁰ = 18102295097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18103343603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6761211 + ... + 6763887.

It is an arithmetic number, because the mean of its divisors is an integer number (807802632).

Almost surely, 2^18103343673 is an apocalyptic number.

It is an amenable number.

18103343673 is a deficient number, since it is larger than the sum of its proper divisors (7746340551).

18103343673 is a wasteful number, since it uses less digits than its factorization.

18103343673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161.

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 18103343673 in words is "eighteen billion, one hundred three million, three hundred forty-three thousand, six hundred seventy-three".