18044882477 has 2 divisors, whose sum is σ = 18044882478. Its totient is φ = 18044882476.

The previous prime is 18044882431. The next prime is 18044882489. The reversal of 18044882477 is 77428844081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12893375401 + 5151507076 = 113549^2 + 71774^2 .

It is a cyclic number.

It is not a de Polignac number, because 18044882477 - 2⁶ = 18044882413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18044882497) 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, 9022441238 + 9022441239.

It is an arithmetic number, because the mean of its divisors is an integer number (9022441239).

Almost surely, 2^18044882477 is an apocalyptic number.

It is an amenable number.

18044882477 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044882477 is an equidigital number, since it uses as much as digits as its factorization.

18044882477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3211264, while the sum is 53.

The spelling of 18044882477 in words is "eighteen billion, forty-four million, eight hundred eighty-two thousand, four hundred seventy-seven".