17994986539 has 2 divisors, whose sum is σ = 17994986540. Its totient is φ = 17994986538.

The previous prime is 17994986459. The next prime is 17994986549. The reversal of 17994986539 is 93568949971.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17994986539 - 2⁷ = 17994986411 is a prime.

It is not a weakly prime, because it can be changed into another prime (17994986549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8997493269 + 8997493270.

It is an arithmetic number, because the mean of its divisors is an integer number (8997493270).

Almost surely, 2^17994986539 is an apocalyptic number.

17994986539 is a deficient number, since it is larger than the sum of its proper divisors (1).

17994986539 is an equidigital number, since it uses as much as digits as its factorization.

17994986539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132269760, while the sum is 70.

The spelling of 17994986539 in words is "seventeen billion, nine hundred ninety-four million, nine hundred eighty-six thousand, five hundred thirty-nine".