17684996081 has 2 divisors, whose sum is σ = 17684996082. Its totient is φ = 17684996080.

The previous prime is 17684996039. The next prime is 17684996089. The reversal of 17684996081 is 18069948671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17368867681 + 316128400 = 131791^2 + 17780^2 .

It is a cyclic number.

It is not a de Polignac number, because 17684996081 - 2¹⁰ = 17684995057 is a prime.

It is a super-2 number, since 2×17684996081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17684996081.

It is not a weakly prime, because it can be changed into another prime (17684996089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8842498040 + 8842498041.

It is an arithmetic number, because the mean of its divisors is an integer number (8842498041).

Almost surely, 2^17684996081 is an apocalyptic number.

It is an amenable number.

17684996081 is a deficient number, since it is larger than the sum of its proper divisors (1).

17684996081 is an equidigital number, since it uses as much as digits as its factorization.

17684996081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 17684996081 in words is "seventeen billion, six hundred eighty-four million, nine hundred ninety-six thousand, eighty-one".