17969840533 has 2 divisors, whose sum is σ = 17969840534. Its totient is φ = 17969840532.

The previous prime is 17969840521. The next prime is 17969840543. The reversal of 17969840533 is 33504896971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16587636849 + 1382203684 = 128793^2 + 37178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17969840533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17969840543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8984920266 + 8984920267.

It is an arithmetic number, because the mean of its divisors is an integer number (8984920267).

Almost surely, 2^17969840533 is an apocalyptic number.

It is an amenable number.

17969840533 is a deficient number, since it is larger than the sum of its proper divisors (1).

17969840533 is an equidigital number, since it uses as much as digits as its factorization.

17969840533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 17969840533 in words is "seventeen billion, nine hundred sixty-nine million, eight hundred forty thousand, five hundred thirty-three".