19981969575 has 48 divisors (see below), whose sum is σ = 35039185920. Its totient is φ = 10013253120.

The previous prime is 19981969573. The next prime is 19981969597. The reversal of 19981969575 is 57596918991.

It is not a de Polignac number, because 19981969575 - 2¹ = 19981969573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19981969573) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 761016 + ... + 786834.

It is an arithmetic number, because the mean of its divisors is an integer number (729983040).

Almost surely, 2^19981969575 is an apocalyptic number.

19981969575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19981969575 is a deficient number, since it is larger than the sum of its proper divisors (15057216345).

19981969575 is a wasteful number, since it uses less digits than its factorization.

19981969575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26456 (or 26451 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 69.

The spelling of 19981969575 in words is "nineteen billion, nine hundred eighty-one million, nine hundred sixty-nine thousand, five hundred seventy-five".