18304808677 has 4 divisors (see below), whose sum is σ = 19268219680. Its totient is φ = 17341397676.

The previous prime is 18304808659. The next prime is 18304808689. The reversal of 18304808677 is 77680840381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18304808677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18304808617) 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, 481705473 + ... + 481705510.

It is an arithmetic number, because the mean of its divisors is an integer number (4817054920).

Almost surely, 2^18304808677 is an apocalyptic number.

It is an amenable number.

18304808677 is a deficient number, since it is larger than the sum of its proper divisors (963411003).

18304808677 is an equidigital number, since it uses as much as digits as its factorization.

18304808677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963411002.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 18304808677 in words is "eighteen billion, three hundred four million, eight hundred eight thousand, six hundred seventy-seven".