18458376847 has 2 divisors, whose sum is σ = 18458376848. Its totient is φ = 18458376846.

The previous prime is 18458376799. The next prime is 18458376851. The reversal of 18458376847 is 74867385481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18458376847 - 2⁷ = 18458376719 is a prime.

It is a super-2 number, since 2×18458376847² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18458376247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9229188423 + 9229188424.

It is an arithmetic number, because the mean of its divisors is an integer number (9229188424).

Almost surely, 2^18458376847 is an apocalyptic number.

18458376847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18458376847 is an equidigital number, since it uses as much as digits as its factorization.

18458376847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36126720, while the sum is 61.

The spelling of 18458376847 in words is "eighteen billion, four hundred fifty-eight million, three hundred seventy-six thousand, eight hundred forty-seven".