18353503537 has 2 divisors, whose sum is σ = 18353503538. Its totient is φ = 18353503536.

The previous prime is 18353503477. The next prime is 18353503541. The reversal of 18353503537 is 73530535381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17751831696 + 601671841 = 133236^2 + 24529^2 .

It is an emirp because it is prime and its reverse (73530535381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18353503537 - 2⁷ = 18353503409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18353503493 and 18353503502.

It is not a weakly prime, because it can be changed into another prime (18353503577) 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, 9176751768 + 9176751769.

It is an arithmetic number, because the mean of its divisors is an integer number (9176751769).

Almost surely, 2^18353503537 is an apocalyptic number.

It is an amenable number.

18353503537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18353503537 is an equidigital number, since it uses as much as digits as its factorization.

18353503537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567000, while the sum is 43.

The spelling of 18353503537 in words is "eighteen billion, three hundred fifty-three million, five hundred three thousand, five hundred thirty-seven".