18531383347 has 2 divisors, whose sum is σ = 18531383348. Its totient is φ = 18531383346.

The previous prime is 18531383263. The next prime is 18531383407. The reversal of 18531383347 is 74338313581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18531383347 - 2²³ = 18522994739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18531383297 and 18531383306.

It is not a weakly prime, because it can be changed into another prime (18531983347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265691673 + 9265691674.

It is an arithmetic number, because the mean of its divisors is an integer number (9265691674).

Almost surely, 2^18531383347 is an apocalyptic number.

18531383347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18531383347 is an equidigital number, since it uses as much as digits as its factorization.

18531383347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The spelling of 18531383347 in words is "eighteen billion, five hundred thirty-one million, three hundred eighty-three thousand, three hundred forty-seven".