18546822677 has 2 divisors, whose sum is σ = 18546822678. Its totient is φ = 18546822676.

The previous prime is 18546822647. The next prime is 18546822691. The reversal of 18546822677 is 77622864581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16431650596 + 2115172081 = 128186^2 + 45991^2 .

It is a cyclic number.

It is not a de Polignac number, because 18546822677 - 2²² = 18542628373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18546822647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9273411338 + 9273411339.

It is an arithmetic number, because the mean of its divisors is an integer number (9273411339).

Almost surely, 2^18546822677 is an apocalyptic number.

It is an amenable number.

18546822677 is a deficient number, since it is larger than the sum of its proper divisors (1).

18546822677 is an equidigital number, since it uses as much as digits as its factorization.

18546822677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 56.

The spelling of 18546822677 in words is "eighteen billion, five hundred forty-six million, eight hundred twenty-two thousand, six hundred seventy-seven".