18473510477 has 2 divisors, whose sum is σ = 18473510478. Its totient is φ = 18473510476.

The previous prime is 18473510401. The next prime is 18473510491. The reversal of 18473510477 is 77401537481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11233032196 + 7240478281 = 105986^2 + 85091^2 .

It is a cyclic number.

It is not a de Polignac number, because 18473510477 - 2⁸ = 18473510221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18473518477) 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, 9236755238 + 9236755239.

It is an arithmetic number, because the mean of its divisors is an integer number (9236755239).

Almost surely, 2^18473510477 is an apocalyptic number.

It is an amenable number.

18473510477 is a deficient number, since it is larger than the sum of its proper divisors (1).

18473510477 is an equidigital number, since it uses as much as digits as its factorization.

18473510477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 18473510477 in words is "eighteen billion, four hundred seventy-three million, five hundred ten thousand, four hundred seventy-seven".