18814475047 has 2 divisors, whose sum is σ = 18814475048. Its totient is φ = 18814475046.

The previous prime is 18814475041. The next prime is 18814475101. The reversal of 18814475047 is 74057441881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18814475047 - 2²⁷ = 18680257319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18814475041) 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, 9407237523 + 9407237524.

It is an arithmetic number, because the mean of its divisors is an integer number (9407237524).

Almost surely, 2^18814475047 is an apocalyptic number.

18814475047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814475047 is an equidigital number, since it uses as much as digits as its factorization.

18814475047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1003520, while the sum is 49.

The spelling of 18814475047 in words is "eighteen billion, eight hundred fourteen million, four hundred seventy-five thousand, forty-seven".