18531521753 has 2 divisors, whose sum is σ = 18531521754. Its totient is φ = 18531521752.

The previous prime is 18531521711. The next prime is 18531521777. The reversal of 18531521753 is 35712513581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18529471129 + 2050624 = 136123^2 + 1432^2 .

It is a cyclic number.

It is not a de Polignac number, because 18531521753 - 2⁶ = 18531521689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18531521753.

It is not a weakly prime, because it can be changed into another prime (18531521053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265760876 + 9265760877.

It is an arithmetic number, because the mean of its divisors is an integer number (9265760877).

Almost surely, 2^18531521753 is an apocalyptic number.

It is an amenable number.

18531521753 is a deficient number, since it is larger than the sum of its proper divisors (1).

18531521753 is an equidigital number, since it uses as much as digits as its factorization.

18531521753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 41.

The spelling of 18531521753 in words is "eighteen billion, five hundred thirty-one million, five hundred twenty-one thousand, seven hundred fifty-three".