17936905642 has 8 divisors (see below), whose sum is σ = 26906656932. Its totient is φ = 8968020000.

The previous prime is 17936905639. The next prime is 17936905643. The reversal of 17936905642 is 24650963971.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16975223521 + 961682121 = 130289^2 + 31011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×17936905642² (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 17936905642.

It is not an unprimeable number, because it can be changed into a prime (17936905643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161859 + ... + 249142.

Almost surely, 2^17936905642 is an apocalyptic number.

17936905642 is a deficient number, since it is larger than the sum of its proper divisors (8969751290).

17936905642 is a wasteful number, since it uses less digits than its factorization.

17936905642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432824.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 17936905642 in words is "seventeen billion, nine hundred thirty-six million, nine hundred five thousand, six hundred forty-two".