18343312301 has 4 divisors (see below), whose sum is σ = 18790710204. Its totient is φ = 17895914400.

The previous prime is 18343312277. The next prime is 18343312303. The reversal of 18343312301 is 10321334381.

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 9980209801 + 8363102500 = 99901^2 + 91450^2 .

It is a cyclic number.

It is not a de Polignac number, because 18343312301 - 2¹⁰ = 18343311277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343312303) 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, 223698890 + ... + 223698971.

It is an arithmetic number, because the mean of its divisors is an integer number (4697677551).

Almost surely, 2^18343312301 is an apocalyptic number.

It is an amenable number.

18343312301 is a deficient number, since it is larger than the sum of its proper divisors (447397903).

18343312301 is an equidigital number, since it uses as much as digits as its factorization.

18343312301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447397902.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 18343312301 its reverse (10321334381), we get a palindrome (28664646682).

The spelling of 18343312301 in words is "eighteen billion, three hundred forty-three million, three hundred twelve thousand, three hundred one".