17980366969 has 2 divisors, whose sum is σ = 17980366970. Its totient is φ = 17980366968.

The previous prime is 17980366949. The next prime is 17980366973. The reversal of 17980366969 is 96966308971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16586091369 + 1394275600 = 128787^2 + 37340^2 .

It is a cyclic number.

It is not a de Polignac number, because 17980366969 - 2²⁵ = 17946812537 is a prime.

It is a super-2 number, since 2×17980366969² (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 17980366969.

It is not a weakly prime, because it can be changed into another prime (17980366949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8990183484 + 8990183485.

It is an arithmetic number, because the mean of its divisors is an integer number (8990183485).

Almost surely, 2^17980366969 is an apocalyptic number.

It is an amenable number.

17980366969 is a deficient number, since it is larger than the sum of its proper divisors (1).

17980366969 is an equidigital number, since it uses as much as digits as its factorization.

17980366969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26453952, while the sum is 64.

The spelling of 17980366969 in words is "seventeen billion, nine hundred eighty million, three hundred sixty-six thousand, nine hundred sixty-nine".