17989336639 has 2 divisors, whose sum is σ = 17989336640. Its totient is φ = 17989336638.

The previous prime is 17989336609. The next prime is 17989336643. The reversal of 17989336639 is 93663398971.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17989336639 - 2⁷ = 17989336511 is a prime.

It is a super-2 number, since 2×17989336639² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17989336609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8994668319 + 8994668320.

It is an arithmetic number, because the mean of its divisors is an integer number (8994668320).

Almost surely, 2^17989336639 is an apocalyptic number.

17989336639 is a deficient number, since it is larger than the sum of its proper divisors (1).

17989336639 is an equidigital number, since it uses as much as digits as its factorization.

17989336639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39680928, while the sum is 64.

The spelling of 17989336639 in words is "seventeen billion, nine hundred eighty-nine million, three hundred thirty-six thousand, six hundred thirty-nine".