18135137717323 has 4 divisors (see below), whose sum is σ = 19783786600728. Its totient is φ = 16486488833920.

The previous prime is 18135137717321. The next prime is 18135137717327. The reversal of 18135137717323 is 32371773153181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18135137717323 - 2¹ = 18135137717321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18135137717321) 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, 824324441686 + ... + 824324441707.

It is an arithmetic number, because the mean of its divisors is an integer number (4945946650182).

Almost surely, 2^{18135137717323} is an apocalyptic number.

18135137717323 is a deficient number, since it is larger than the sum of its proper divisors (1648648883405).

18135137717323 is a wasteful number, since it uses less digits than its factorization.

18135137717323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648648883404.

The product of its digits is 2222640, while the sum is 52.

The spelling of 18135137717323 in words is "eighteen trillion, one hundred thirty-five billion, one hundred thirty-seven million, seven hundred seventeen thousand, three hundred twenty-three".