18304677311 has 4 divisors (see below), whose sum is σ = 19268081400. Its totient is φ = 17341273224.

The previous prime is 18304677233. The next prime is 18304677331. The reversal of 18304677311 is 11377640381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11377640381 = 36571 ⋅311111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18304677311 is a prime.

It is a super-2 number, since 2×18304677311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18304677331) 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, 481702016 + ... + 481702053.

It is an arithmetic number, because the mean of its divisors is an integer number (4817020350).

Almost surely, 2^18304677311 is an apocalyptic number.

18304677311 is a deficient number, since it is larger than the sum of its proper divisors (963404089).

18304677311 is an equidigital number, since it uses as much as digits as its factorization.

18304677311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963404088.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 18304677311 in words is "eighteen billion, three hundred four million, six hundred seventy-seven thousand, three hundred eleven".