19883971445 has 16 divisors (see below), whose sum is σ = 26117463792. Its totient is φ = 14442831360.

The previous prime is 19883971441. The next prime is 19883971451. The reversal of 19883971445 is 54417938891.

It can be written as a sum of positive squares in 8 ways, for example, as 2877464164 + 17006507281 = 53642^2 + 130409^2 .

It is not a de Polignac number, because 19883971445 - 2² = 19883971441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19883971441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2503472 + ... + 2511401.

It is an arithmetic number, because the mean of its divisors is an integer number (1632341487).

Almost surely, 2^19883971445 is an apocalyptic number.

It is an amenable number.

19883971445 is a deficient number, since it is larger than the sum of its proper divisors (6233492347).

19883971445 is a wasteful number, since it uses less digits than its factorization.

19883971445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014952.

The product of its digits is 8709120, while the sum is 59.

The spelling of 19883971445 in words is "nineteen billion, eight hundred eighty-three million, nine hundred seventy-one thousand, four hundred forty-five".