19973603584 has 135 divisors (see below), whose sum is σ = 44464825965. Its totient is φ = 8954542080.

The previous prime is 19973603513. The next prime is 19973603591. The reversal of 19973603584 is 48530637991.

The square root of 19973603584 is 141328.

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., 11337990400 + 8635613184 = 106480^2 + 92928^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 273610972 + ... + 273611044.

Almost surely, 2^19973603584 is an apocalyptic number.

19973603584 is the 141328-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19973603584

19973603584 is an abundant number, since it is smaller than the sum of its proper divisors (24491222381).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19973603584 is an frugal number, since it uses more digits than its factorization.

19973603584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 19973603584 in words is "nineteen billion, nine hundred seventy-three million, six hundred three thousand, five hundred eighty-four".