18745499337553 has 2 divisors, whose sum is σ = 18745499337554. Its totient is φ = 18745499337552.

The previous prime is 18745499337457. The next prime is 18745499337559. The reversal of 18745499337553 is 35573399454781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17334174345489 + 1411324992064 = 4163433^2 + 1187992^2 .

It is a cyclic number.

It is not a de Polignac number, because 18745499337553 - 2³³ = 18736909402961 is a prime.

It is not a weakly prime, because it can be changed into another prime (18745499337559) 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, 9372749668776 + 9372749668777.

It is an arithmetic number, because the mean of its divisors is an integer number (9372749668777).

Almost surely, 2^{18745499337553} is an apocalyptic number.

It is an amenable number.

18745499337553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18745499337553 is an equidigital number, since it uses as much as digits as its factorization.

18745499337553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608000, while the sum is 73.

The spelling of 18745499337553 in words is "eighteen trillion, seven hundred forty-five billion, four hundred ninety-nine million, three hundred thirty-seven thousand, five hundred fifty-three".