19769755864 has 16 divisors (see below), whose sum is σ = 37098619920. Its totient is φ = 9876790560.

The previous prime is 19769755771. The next prime is 19769755867. The reversal of 19769755864 is 46855796791.

It is a self number, because there is not a number n which added to its sum of digits gives 19769755864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19769755867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000527 + ... + 1020094.

It is an arithmetic number, because the mean of its divisors is an integer number (2318663745).

Almost surely, 2^19769755864 is an apocalyptic number.

It is an amenable number.

19769755864 is a deficient number, since it is larger than the sum of its proper divisors (17328864056).

19769755864 is a wasteful number, since it uses less digits than its factorization.

19769755864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021850 (or 2021846 counting only the distinct ones).

The product of its digits is 114307200, while the sum is 67.

The spelling of 19769755864 in words is "nineteen billion, seven hundred sixty-nine million, seven hundred fifty-five thousand, eight hundred sixty-four".