19769734512 has 120 divisors (see below), whose sum is σ = 60980315760. Its totient is φ = 5929021440.

The previous prime is 19769734493. The next prime is 19769734519. The reversal of 19769734512 is 21543796791.

19769734512 is a `hidden beast` number, since 1 + 9 + 7 + 6 + 97 + 34 + 512 = 666.

It is a super-4 number, since 4×19769734512⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19769734519) 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 23 ways as a sum of consecutive naturals, for example, 89314 + ... + 217982.

It is an arithmetic number, because the mean of its divisors is an integer number (508169298).

Almost surely, 2^19769734512 is an apocalyptic number.

19769734512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19769734512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30490157880).

19769734512 is an abundant number, since it is smaller than the sum of its proper divisors (41210581248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19769734512 is a wasteful number, since it uses less digits than its factorization.

19769734512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128791 (or 128782 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The spelling of 19769734512 in words is "nineteen billion, seven hundred sixty-nine million, seven hundred thirty-four thousand, five hundred twelve".