19657860000 has 480 divisors, whose sum is σ = 67649795136. Its totient is φ = 4992000000.

The previous prime is 19657859993. The next prime is 19657860017. The reversal of 19657860000 is 6875691.

It is a tau number, because it is divible by the number of its divisors (480).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 150059935 + ... + 150060065.

Almost surely, 2^19657860000 is an apocalyptic number.

19657860000 is a gapful number since it is divisible by the number (10) 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 19657860000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33824897568).

19657860000 is an abundant number, since it is smaller than the sum of its proper divisors (47991935136).

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

19657860000 is a wasteful number, since it uses less digits than its factorization.

19657860000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 19657860000 in words is "nineteen billion, six hundred fifty-seven million, eight hundred sixty thousand".