18304428347 has 2 divisors, whose sum is σ = 18304428348. Its totient is φ = 18304428346.

The previous prime is 18304428313. The next prime is 18304428367. The reversal of 18304428347 is 74382440381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18304428347 - 2¹² = 18304424251 is a prime.

It is a super-2 number, since 2×18304428347² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18304428298 and 18304428307.

It is not a weakly prime, because it can be changed into another prime (18304428367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9152214173 + 9152214174.

It is an arithmetic number, because the mean of its divisors is an integer number (9152214174).

Almost surely, 2^18304428347 is an apocalyptic number.

18304428347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18304428347 is an equidigital number, since it uses as much as digits as its factorization.

18304428347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 18304428347 in words is "eighteen billion, three hundred four million, four hundred twenty-eight thousand, three hundred forty-seven".