18365234977 has 2 divisors, whose sum is σ = 18365234978. Its totient is φ = 18365234976.

The previous prime is 18365234911. The next prime is 18365234999. The reversal of 18365234977 is 77943256381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15803255521 + 2561979456 = 125711^2 + 50616^2 .

It is a cyclic number.

It is not a de Polignac number, because 18365234977 - 2¹⁵ = 18365202209 is a prime.

It is not a weakly prime, because it can be changed into another prime (18365234477) 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, 9182617488 + 9182617489.

It is an arithmetic number, because the mean of its divisors is an integer number (9182617489).

Almost surely, 2^18365234977 is an apocalyptic number.

It is an amenable number.

18365234977 is a deficient number, since it is larger than the sum of its proper divisors (1).

18365234977 is an equidigital number, since it uses as much as digits as its factorization.

18365234977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 55.

The spelling of 18365234977 in words is "eighteen billion, three hundred sixty-five million, two hundred thirty-four thousand, nine hundred seventy-seven".