17972619844 has 27 divisors (see below), whose sum is σ = 33419513757. Its totient is φ = 8455558464.

The previous prime is 17972619839. The next prime is 17972619883. The reversal of 17972619844 is 44891627971.

The square root of 17972619844 is 134062.

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., 13992524100 + 3980095744 = 118290^2 + 63088^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4556137 + ... + 4560079.

Almost surely, 2^17972619844 is an apocalyptic number.

17972619844 is the 134062-nd square number.

It is an amenable number.

17972619844 is a deficient number, since it is larger than the sum of its proper divisors (15446893913).

17972619844 is an frugal number, since it uses more digits than its factorization.

17972619844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7924 (or 3962 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 58.

The spelling of 17972619844 in words is "seventeen billion, nine hundred seventy-two million, six hundred nineteen thousand, eight hundred forty-four".