18350018668337 has 4 divisors (see below), whose sum is σ = 18373042531956. Its totient is φ = 18326994804720.

The previous prime is 18350018668321. The next prime is 18350018668339. The reversal of 18350018668337 is 73386681005381.

It is a happy number.

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 11963359698481 + 6386658969856 = 3458809^2 + 2527184^2 .

It is a cyclic number.

It is not a de Polignac number, because 18350018668337 - 2⁴ = 18350018668321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18350018668339) 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, 11511930614 + ... + 11511932207.

It is an arithmetic number, because the mean of its divisors is an integer number (4593260632989).

Almost surely, 2^{18350018668337} is an apocalyptic number.

It is an amenable number.

18350018668337 is a deficient number, since it is larger than the sum of its proper divisors (23023863619).

18350018668337 is an equidigital number, since it uses as much as digits as its factorization.

18350018668337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23023863618.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 18350018668337 in words is "eighteen trillion, three hundred fifty billion, eighteen million, six hundred sixty-eight thousand, three hundred thirty-seven".