18229184977 has 2 divisors, whose sum is σ = 18229184978. Its totient is φ = 18229184976.

The previous prime is 18229184951. The next prime is 18229185019. The reversal of 18229184977 is 77948192281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17608228416 + 620956561 = 132696^2 + 24919^2 .

It is a cyclic number.

It is not a de Polignac number, because 18229184977 - 2²⁷ = 18094967249 is a prime.

It is not a weakly prime, because it can be changed into another prime (18229188977) 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, 9114592488 + 9114592489.

It is an arithmetic number, because the mean of its divisors is an integer number (9114592489).

Almost surely, 2^18229184977 is an apocalyptic number.

It is an amenable number.

18229184977 is a deficient number, since it is larger than the sum of its proper divisors (1).

18229184977 is an equidigital number, since it uses as much as digits as its factorization.

18229184977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 58.

The spelling of 18229184977 in words is "eighteen billion, two hundred twenty-nine million, one hundred eighty-four thousand, nine hundred seventy-seven".