19681740960 has 96 divisors (see below), whose sum is σ = 70854279552. Its totient is φ = 4498682880.

The previous prime is 19681740893. The next prime is 19681740961. The reversal of 19681740960 is 6904718691.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (19681740961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925471 + ... + 2932190.

It is an arithmetic number, because the mean of its divisors is an integer number (738065412).

Almost surely, 2^19681740960 is an apocalyptic number.

19681740960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19681740960 is an abundant number, since it is smaller than the sum of its proper divisors (51172538592).

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

19681740960 is a wasteful number, since it uses less digits than its factorization.

19681740960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857686 (or 5857678 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 19681740960 in words is "nineteen billion, six hundred eighty-one million, seven hundred forty thousand, nine hundred sixty".