19844973969 has 8 divisors (see below), whose sum is σ = 26908439520. Its totient is φ = 13005745536.

The previous prime is 19844973959. The next prime is 19844973977. The reversal of 19844973969 is 96937944891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19844973969 - 2²³ = 19836585361 is a prime.

It is a super-2 number, since 2×19844973969² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19844973959) 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, 56059072 + ... + 56059425.

It is an arithmetic number, because the mean of its divisors is an integer number (3363554940).

Almost surely, 2^19844973969 is an apocalyptic number.

It is an amenable number.

19844973969 is a deficient number, since it is larger than the sum of its proper divisors (7063465551).

19844973969 is a wasteful number, since it uses less digits than its factorization.

19844973969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112118559.

The product of its digits is 105815808, while the sum is 69.

The spelling of 19844973969 in words is "nineteen billion, eight hundred forty-four million, nine hundred seventy-three thousand, nine hundred sixty-nine".