19657386652 has 12 divisors (see below), whose sum is σ = 34405547176. Its totient is φ = 9827230320.

The previous prime is 19657386647. The next prime is 19657386653. The reversal of 19657386652 is 25668375691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19657386653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335238 + ... + 389485.

Almost surely, 2^19657386652 is an apocalyptic number.

It is an amenable number.

19657386652 is a deficient number, since it is larger than the sum of its proper divisors (14748160524).

19657386652 is a wasteful number, since it uses less digits than its factorization.

19657386652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731508 (or 731506 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 58.

The spelling of 19657386652 in words is "nineteen billion, six hundred fifty-seven million, three hundred eighty-six thousand, six hundred fifty-two".