19973778598 has 16 divisors (see below), whose sum is σ = 30778369344. Its totient is φ = 9714461760.

The previous prime is 19973778593. The next prime is 19973778607. The reversal of 19973778598 is 89587737991.

It is a self number, because there is not a number n which added to its sum of digits gives 19973778598.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973778593) 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 7 ways as a sum of consecutive naturals, for example, 271386 + ... + 337042.

It is an arithmetic number, because the mean of its divisors is an integer number (1923648084).

Almost surely, 2^19973778598 is an apocalyptic number.

19973778598 is a deficient number, since it is larger than the sum of its proper divisors (10804590746).

19973778598 is a wasteful number, since it uses less digits than its factorization.

19973778598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69807.

The product of its digits is 240045120, while the sum is 73.

The spelling of 19973778598 in words is "nineteen billion, nine hundred seventy-three million, seven hundred seventy-eight thousand, five hundred ninety-eight".