18478861067 has 2 divisors, whose sum is σ = 18478861068. Its totient is φ = 18478861066.

The previous prime is 18478860943. The next prime is 18478861069. The reversal of 18478861067 is 76016887481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18478861067 - 2²⁰ = 18477812491 is a prime.

Together with 18478861069, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18478861069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9239430533 + 9239430534.

It is an arithmetic number, because the mean of its divisors is an integer number (9239430534).

Almost surely, 2^18478861067 is an apocalyptic number.

18478861067 is a deficient number, since it is larger than the sum of its proper divisors (1).

18478861067 is an equidigital number, since it uses as much as digits as its factorization.

18478861067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 18478861067 in words is "eighteen billion, four hundred seventy-eight million, eight hundred sixty-one thousand, sixty-seven".