18750984005477 has 2 divisors, whose sum is σ = 18750984005478. Its totient is φ = 18750984005476.

The previous prime is 18750984005447. The next prime is 18750984005503. The reversal of 18750984005477 is 77450048905781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9784546656676 + 8966437348801 = 3128026^2 + 2994401^2 .

It is an emirp because it is prime and its reverse (77450048905781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18750984005477 - 2¹⁰ = 18750984004453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18750984005447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375492002738 + 9375492002739.

It is an arithmetic number, because the mean of its divisors is an integer number (9375492002739).

Almost surely, 2^{18750984005477} is an apocalyptic number.

It is an amenable number.

18750984005477 is a deficient number, since it is larger than the sum of its proper divisors (1).

18750984005477 is an equidigital number, since it uses as much as digits as its factorization.

18750984005477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79027200, while the sum is 65.

The spelling of 18750984005477 in words is "eighteen trillion, seven hundred fifty billion, nine hundred eighty-four million, five thousand, four hundred seventy-seven".