17996538329 has 32 divisors (see below), whose sum is σ = 22920662016. Its totient is φ = 13724320320.

The previous prime is 17996538289. The next prime is 17996538349. The reversal of 17996538329 is 92383569971.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 17996538329 - 2¹² = 17996534233 is a prime.

It is a super-2 number, since 2×17996538329² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17996538349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670679 + ... + 696995.

It is an arithmetic number, because the mean of its divisors is an integer number (716270688).

Almost surely, 2^17996538329 is an apocalyptic number.

It is an amenable number.

17996538329 is a deficient number, since it is larger than the sum of its proper divisors (4924123687).

17996538329 is a wasteful number, since it uses less digits than its factorization.

17996538329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26525.

The product of its digits is 22044960, while the sum is 62.

The spelling of 17996538329 in words is "seventeen billion, nine hundred ninety-six million, five hundred thirty-eight thousand, three hundred twenty-nine".