19959764469 has 8 divisors (see below), whose sum is σ = 26635331712. Its totient is φ = 13295353440.

The previous prime is 19959764351. The next prime is 19959764471. The reversal of 19959764469 is 96446795991.

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

It is not a de Polignac number, because 19959764469 - 2¹¹ = 19959762421 is a prime.

It is a super-2 number, since 2×19959764469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19959764479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2784877 + ... + 2792034.

It is an arithmetic number, because the mean of its divisors is an integer number (3329416464).

Almost surely, 2^19959764469 is an apocalyptic number.

It is an amenable number.

19959764469 is a deficient number, since it is larger than the sum of its proper divisors (6675567243).

19959764469 is a wasteful number, since it uses less digits than its factorization.

19959764469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578107.

The product of its digits is 132269760, while the sum is 69.

The spelling of 19959764469 in words is "nineteen billion, nine hundred fifty-nine million, seven hundred sixty-four thousand, four hundred sixty-nine".