17894947984 has 45 divisors (see below), whose sum is σ = 35394075129. Its totient is φ = 8764741440.

The previous prime is 17894947981. The next prime is 17894948021. The reversal of 17894947984 is 48974949871.

The square root of 17894947984 is 133772.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 12900416400 + 4994531584 = 113580^2 + 70672^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17894947981) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28359349 + ... + 28359979.

Almost surely, 2^17894947984 is an apocalyptic number.

17894947984 is the 133772-nd square number.

It is an amenable number.

17894947984 is a deficient number, since it is larger than the sum of its proper divisors (17499127145).

17894947984 is an frugal number, since it uses more digits than its factorization.

17894947984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 686 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 70.

The spelling of 17894947984 in words is "seventeen billion, eight hundred ninety-four million, nine hundred forty-seven thousand, nine hundred eighty-four".